I am working on building a new PC, current PC:
AMD XP 3600+(2.1ghz)
3x512 DDR RAM(PC3200, 1500mb)
EVGA 128mb 6600GT
80gb hdd

New PC:
ASUS M2N32-SLI AM2 motherboard
EVGA GeForce 8800GT Superclocked 512MB(PCI E, old was AGP)
G.SKILL 2GB (2 x 1GB) DDR2(PC2 6400)
Seagate 250GB HDD(SATA)
AMD Athlon 64 X2 6400+ Windsor 3.2GHz

My main question is how much power do I need? I am thinking about getting a Thermaltake W0106RU 700W  supply, is that sufficient? I doubt I will ever run in SLI, as to me it seems a waste of money right now(no game really needs that much power atm). And if anyone has some suggestions about what to get let me know, my spending limit doesn't really matter(this is around $900) but preferably cheapest I can get that will run any current game on high settings. Thanks for any input!

Yea, I am not really interested in Crysis. I don't like games that rely completely on graphics, mostly my current PC is outdated.. I can't run TF2 on highest settings, and some new games don't even make it(which is sad, my PC is only 2 years old and at that time it could run every game on the market at highest settings). If I added another card in SLI and another stick of RAM I could get Crysis on one of the highest settings, I am getting a motherboard this time that I can upgrade unlike last time.

Crysis will run fine almost perfect on that graphics card. Benchmarks show that you'll get around 35 FPS with no AA, and around 23 FPS with full AA at a 1600x1200 resolution. But you're not really interested in Crysis so that doesn't really apply here.
You're current PC is actually almost the same as mine, Magicbush. I have an AMD XP 3400+, with the same graphics card and 1GB of RAM. I'm thinking of doing an upgrade myself.
By the way, does anybody know if there's a huge difference between the Intel Quad Core, Dual Core, or AMD's new processors? I'm thinking of getting a Quad Core, but I'm not sure if it's really worth the extra money.

Thanks for looking that up. I saw a article on the net about Intel vs. AMD, for next-gen processors. It had around 6 pages worth of different tests/benchmark tests. The new AMD processors blew the intel away, and they are much cheaper(almost half the price of Intel processors of same speed).  I think Intel stuff is more for servers, and business type processes whereas AMD is more for the average joe playing games.

Full AA? What are we talkin' here? 4x? 8x? 16x?

Edit: Also, I'm running sli with 4 hdds and a dvdrw and 4 extra case fans and I'm doing fine on my 600w, so 700w sounds like plenty.

thanks for the input all.

Thanks for looking that up. I saw a article on the net about Intel vs. AMD, for next-gen processors. It had around 6 pages worth of different tests/benchmark tests. The new AMD processors blew the intel away, and they are much cheaper(almost half the price of Intel processors of same speed).  I think Intel stuff is more for servers, and business type processes whereas AMD is more for the average joe playing games.

Uh, where is this article? Last time I checked, AMD was struggling to keep up with Intel. I got a new computer half a year ago and unfortunately went with AMD because I didn't know Intel would had been the better choice. Maybe it's different now though, I dunno. I'm not really all that well educated on processors but I'm sure someone with more knowledge on the situation can help you choose which processor to pick. I also think that going with 4 gigs of ram could be a good idea.

I'm.. talking from my PC. E6600, 8800 GTX, 2MB DDR2, I can run it on 1280x1024 with no AA if I OC the card, but even 2xAA on some levels (ie the start one with the jump, any of the densly packed forest levels) and it goes below 20fps which I don't accept.

no wonder.....

Uh, where is this article? Last time I checked, AMD was struggling to keep up with Intel. I got a new computer half a year ago and unfortunately went with AMD because I didn't know Intel would had been the better choice. Maybe it's different now though, I dunno. I'm not really all that well educated on processors but I'm sure someone with more knowledge on the situation can help you choose which processor to pick. I also think that going with 4 gigs of ram could be a good idea.

http://reviews.cnet.com/4520-10442_7-6389077-1.html

That's one spot, just search AMD vs. Intel in google lol. But yea, to start off with I was doing the 2gigs(the mobo has 4 slots, 2 gigs = 2 slots) and as I get money plan to upgrade to 4gb. Also to note, I have used Asus mobo's for years now, and have had no problems(current PC uses a Asus A7n8x-x mobo and is 3 years old). I decided Asus since I had good luck in the past, and am leary about trying new company's.

Oh yea, at work today our instructor was talking about a customer's HDD. He kept saying 250gb of memory, we all assumed RAM and were thinking what the hell. He was talking about how 250gb of memory would be a thing of the past by next year, and how consumers are demanding more and more(with up to a terabyte now). I was thinking what the hell 250gb of RAM will last years into the future rofl. After class he got hounded on lol.

edit: Hrm, just realized some of those reviews are almost 2 years old. I may look into pentiums actually, I have never had a Pentium processor though so have no clue what the differences are. I use my PC for gaming(pretty hardcore), and like to play newest games on at least medium-high settings. I mean 3.4 ghz/w dual-core seems like a good processor(current is a single-core with only 2.1ghz), but I don't know.