For that money, I will just give you approximate prices.
Case: Silverstone TJ09B-W $300
PSU: Silverstone Zeus 750W $200
Intel Core 2 Quad Q6600: $900
Motherboard: ASUS P5N32-E SLI: $300
RAM:2GB DDR2 800 Crucial Ballistix RAM $290
GPU: Geforce 8800GTX $550
Sound Card: Auzentech X-Meridian $180
HDD1: Western Digital Raptor 150GB 10,000rpm $220
HDD2: Two 500GB Western Digital 7,200rpm drives. $300 for your raw video
Run the 500GB drives off an Areca RAID controller $300
Monitor: The updated 30"
Dell UltraSharp 3007WFP-HC $1700
So far, we've spent
$5240 Let's bring it up to $6000 with a few peripherals (a multi-function printer/scanner/copier, optical drives etc, keyboard, mouse etc.), shipping, taxes.
With the rest of the money, get a decent receiver like the
Denon AVR-3806 That's another $1K. ...and the rest on some nice speakers from Axiom Audio, Paradigm, Monitor Audio or your brand of choice. There are others who know much more than me about speakers.
He knows who he is
Edit: forgot to throw in SLI for the 2560x1600 behemoth. Add another $550 to the rig price.