I spent about $450 on mine. I bought the CoolerMaster HAF 932, 2TB hard drive, 750watt Corsair PS, DVD Writer.
My Brother gave me all his old hardware - misc motherboard, AMD triple core, 5770 ATI Raedon, and 8 gigs of ddr2 memory.
I have just recently bought a EVGA 01G-P3-1563-AR GeForce GTX 560 Ti Super Clocked Video Card that is on its way to me. I plan on throwing that in my crappy mother board and 3 core processer until next month when I can afford to upgrade my motherboard and Processor to the EVGA X58 Classified3 mother board and a I7 Processor
I really want to get a Astro A-40 gaming headset too. As well as Creative Labs Sound Blaster X- FI Fatality. Plus a gaming keyboard would be nice!
So I'd say I got about another Grand to spend..