since you seem to bethe kind of person who will spend huge sums of money on their computer, i'll take someone elses idea and spec a dual Xeon quad 580 SLI rig. that might keep you happy for a bit:
use the PSU i have included to power two of the GTX580's and nothing else, because im 99% sure that a single 1200W PSU wont cover all this:
YOUR BASKET
2 x Intel Xeon X5680 3.33GHz (Westmere) (Socket 1366) - Retail £1368.50
1 x Crucial RealSSD M4 512GB 2.5" SATA 6Gb/s Solid State Hard Drive £719.99
1 x EVGA Classified SR-2 Intel 5520 (Socket 1366) DDR3 Motherboard (270-WS-W555-ER) £599.99
4 x Gainward GeForce GTX 580 "Phantom" 3072MB GDDR5 PCI-Express Graphics Card £479.99
4 x Corsair Vengeance 12GB (3x4GB) DDR3 PC3-12800C9 1600MHz Triple Channel Kit (CMZ12GX3M3A1600C9) £143.99
1 x Pioneer BDR-206DBK 12x BluRay RW / 16x DVD±RW Drive - Black (OEM) £107.99
1 x XFX Pro 550W Core Edition Power Supply £50.99
1 x Seagate Barracuda 1TB SATA-II 32MB Cache - OEM (ST1000DL002) £37.99
Total : £6,763.36 (includes shipping : £11.25).
Does your room get hot?