I'm building this one...
GAMMA Classic Series ATX Mid Tower Interior Steel Chassis (Black) - $40
Crucial 128 GB m4 2.5-Inch Solid State Drive SATA 6Gb/s - $125
Intel Core i5 3570K Processor 3.4 4 BX80637I53570K (Ivy Bridge) - $220
MSI Radeon HD 6870 1 GB 256-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card with Eyefinity R6870 Twin Frozr II - $180
OCZ ModXStream Pro 600W Modular High Performance Power Supply compatible with Intel Sandy Bridge Core i3 i5 i7 and AMD Phenom - $65
Crucial 122435 RAM Module - 8 GB (2 x 4 GB) - DDR3 SDRAM 1333 MHz DDR3-1333/PC3-10600 - Non-ECC - Unbuffered - 240-pin DIMM - $45
Gigabyte Intel Z77 LGA1155 AMD CrossFireX/NVIDIA SLI DVI/HDMI Dual UEFI BIOS mATX Motherboard GA-Z77MX-D3H - $130
THAT SAME ASUS DRIVE
Kinda skimped on GPU but I think the 6870 is a good value. I guess my e-penis will shrink because I can't run Witcher 2 on ultra maximum or something. I really like the GTX 570 but I think that's around $300. Also, I think for $50 more you can get an SSD that does 6 gb/s (the Crucial does 3gb/s). I figure since my PC is 8 years old, I'll be happy anyways.
Ya, I got to shell out $99 for win 7 too. I looked a little bit but I don't think you can get it cheaper. Also, gl getting D3 to run smooth on a Linux w/ Wine.