So my desktop has been officially archaic for about 6 months now and with me coming into some money in two months I wanted to start looking at potential parts for my replacement I'll be building. When I made my current comp Belross actually picked out the parts for me but I think I've know enough now to at least attempt to get a list of parts together that'll work. Just note that I want this to be a gaming computer and to try and keep the price around $1500 while still being semi-future proof. My big thing is I want to be able to SLI it in a year or so when it starts to fall behind as a quick burst in power to keep it up to date. Right now the price total is at $1,625.39 and while I'm not hurting to lower it I would like to try and avoid raising that number if at all possible. I'm getting $500 fom my parents and $500 from a CD I have maturing soon so the rest is out of my pocket.

Case
Thermaltake Armor Series VA8000BWS Black Aluminum / Steel ATX Full Tower Computer Case

Harddrive
Western Digital Caviar SE16 WD2500KS 250GB 7200 RPM 16MB Cache SATA 3.0Gb/s Hard Drive

Video Card
XFX PVT88GYDF4 GeForce 8800GTS (G92) 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card

DVD-ROM
Sony NEC Optiarc Black IDE DVD-ROM Drive Model DDU1615/B2s

Sound Card
Creative Sound Blaster SB0570 Audigy SE 7.1 Channels PCI Interface Sound Card

Power Supply
OCZ GameXStream OCZ850GXSSLI ATX12V v2.2 and EPS12V 850Watts Power Supply 100 - 240 V CB, CE, CSA, UL

Memory x2
Patriot Extreme Performance 2GB 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Desktop Memory

Motherboard
XFX MB-N780-ISH9 LGA 775 NVIDIA nForce 780i SLI Intel Motherboard

Processor
Intel Core 2 Quad Q6600 Kentsfield 2.4GHz LGA 775 Quad-Core Processor Model BX80562Q6600

Operating System
Microsoft Windows Vista 64-Bit Home Premium for System Builders Single Pack DVD

You're going overboard with the motherboard and powersupply, and you could find a much better deal on that memory even on the same site.

Mate that case sucks, get this https://www.overclockers.co.uk/showproduct.php?prodid=CA-141-CM 

Woah man, that is OVERKILL.
I built my machine with only $600(minus the OS, DVD Drive and sound card), and it's the same as yours.

First off, get rid of that motherboard. There is absolutely no need for a 780i, seeing as 3 graphics cards in SLI won't be compatible for games for a LONG time. Go with a Gigabyte or something similar to that. Seriously, you really don't need that motherboard at all. You can overclock your processor the same amount with a $100 cheaper board.

As for the case, I would go with one of these:
http://www.newegg.com/Product/Product.aspx?Item=N82E16811129021&Tpk=antec%2b900
OR
http://www.newegg.com/Product/Product.aspx?Item=N82E16811129025
The P182 will give you great cable management, and it's quiet as hell. The Antec 900 has some room for some additional fans though.

That's a great graphics card you picked out though. I would go with an 8800GT, but spending a little extra for the new 8800GTS is definately worth it. It also has much better cooling, which is good for overclocking.

Power supply....once again, you don't need all of that. I bought a $60 power supply(550 SLI Ready) and it works great for my 8800GT and Q6600. For you though, I would go with one of these:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817341002
Yes, it will be enough power for SLI, etc.

The processor you picked out is incredible. I have a Q6600 with the G0 and it's amazing. You can easily overclock that thing to 3.4ghz with proper cooling.

Everything else sounds good. really though, you don't need to spend more than $1000 for a great gaming computer. I'm able to play Crysis on ultra high with my system. So you're definately going overboard right now. Make some adjustments, and post on some other forums to get some opinions as well.

Thanks for the feedback everyone.

1. For the case my parents actually did a pretty awesome thing and fronted me some circuit city gift cards to get this case so I'm definately gonna take them up on that offer.

2. For the motherboard I honestly couldn't find a single way to figure out which boards supported SLI at all or not, so I just searched SLi among all the PCI-E 2.0 boards and that came up. Would this board work?

3. That was actually the original supply I picked out but after using newegg's power calculator for my system fully decked out (8mb ram dual 8800GTS) it suggested 750MHz and with the 850MHz supply only a bit more than the 800 I figured better safe than sorry. You think the 700 might be good enough after all?

4. With a motherboard with DDR2 1200 standard for memory could I use any ram with numbers UP TO 1200? Because there arn't any 2gb sticks in DDR2 1200 and I wanted to have 8gb ram eventually.

Alright, we really need to know what you're using this computer for. If it's just for gaming, you're still going overboard.

What's the point of 8GB? That's really only for professional use, not for gaming. Getting 4GB would be the best choice.
Also regarding RAM, there is almost no noticeable difference between PC2 6400 and PC2 9600. And right now, it is definately not worth the price. You can see right now that 2X1GB sticks cost $200 on Newegg. Imagine 2X2GB. You would be spending more than $1000 just to get 8GB. Give it a year, and you'll see DDR2 1200 Ram drop in price significantly.
But to answer your question, yes. You can have any DDR2 ram with numbers up to 1200.

If the power calculator suggested 750Mhz with the 8GB Ram and everything, that's probably what you'll need. I would probably suggest getting this then:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139006
This will definately be enough to power your system with everything you mentioned with no problems. Plus Corsair makes great products, I've never doubted them.

That motherboard will work great. If you've got the money, get it.

And I would get the case if I was offered it.

Oh I wouldn't plan on getting 8gb for awhile; I just wanted to be sure my comp could be upgraded to last over the next 3 years or so without being obsolete. I figure there's a decent enough chance that in 2 years or so 6gb or more could be usable by games so i might as well prepare now.

Yea, lotta sites don't list whether a motherboard is SLI, nor have a good search feature to find them. I usually just browse the pictures of the motherboards for the two 16x PCIE slots, and if that doesn't work, I'll look through a chipset series that has it like the nforce 4 SLI.