My new computer, using a few parts from my old, but still pretty darn fast!

Asus A8N-SLI nForce4 Premium
AMD Opteron 165 @ 1.9ghz 210HTT/9x (Have not really overclocked this yet, just tested a 5% boost)
   - 64bit Dual Cores, 1mb Level 2 Cache on each one
XFX 7900GT Extreme @ 550/1700
1024 Corsair PC3200 Value Ram, Stock Timings
320GB SATA 3.0 7200 RPM 16mb Cache Western Digital Caviar
SB Audigy ZS
Sunbeam Nuuo 550w PSU

Windows XP Professional SP2 - eXPerience "Mini-XP" edition (A trimmed down version of windows whose installer is only 121mb, fits on a minidisc, and on fresh intall uses only 48mb of ram. It is very optimized)

And I stuffed it all into one of my first ATX cases I got 6 years ago! I didnt feel like spending a lot of money for a durable steel case, only to get stupid eccentric designs and cheap parts.