This system is more than good enough, no point overspending if you don't need it. Why are you still speccing a Physics card? Aegia marketing won you over? Also paying a lot for the "fastest" AMD CPU, the 4800 is half the price and only 200mhz slower! Get the 4800 and overclock it.
AMD Athlon 64 X2 Dual Core 4800+ (Socket 939) - Retail (ADA4800CDBOX) (CP-129-AM)
£359.95 £359.95
MB-131-AS Asus A8R32-MVP Deluxe Crossfire (Socket 939) PCI-Express Motherboard (MB-131-AS)
£109.95 £109.95
MY-093-CS Corsair 2GB DDR XMS3500LL Pro TwinX (2x1GB) CAS2 (MY-093-CS)
£165.95 £165.95
CA-096-CM CoolerMaster Stacker RC-810 - Silver Trim (No PSU) (CA-096-CM)
£89.95 £89.95
HD-075-WD Western Digital Caviar SE16 500GB 5000KS SATA-II 16MB Cache - OEM (HD-075-WD)
£142.95 £142.95
GX-059-PC PowerColor ATI Radeon X1900 XT-X 512MB GDDR3 AVIVO TV-Out/Dual DVI (PCI-Express) - Retail (GX-059-PC)
£274.95 £274.95
HS-003-SY Scythe Ninja Plus Heatpipe CPU Cooler (Socket 478, 754, 939, 940, LGA755) (HS-003-SY)
£26.95 £26.95
GX-045-CO ATI Radeon X1900 ***Crossfire Edition*** 512MB GDDR3 TV-Out/Dual DVI (PCI-Express) - Retail (GX-045-CO)
£249.95 £249.95
CA-024-EN Enermax Liberty 620W ELT620AWT ATX2.2 Modular SLI Compliant PSU (CA-024-EN)
£84.95 £84.95
SC-031-CL Creative Sound Blaster X-Fi Elite Pro - Retail (SC-031-CL)
£163.95 £163.95
BU-001-WD Western Digital Raptor 150GB 10,000RPM SATA 16MB Cache RAID Bundle (BU-001-WD)
HD-069-WD Western Digital Raptor 150GB WD1500ADFD 10,000RPM SATA 16MB Cache - OEM (HD-069-WD) 2
£313.00 £313.00
UP-014-AP APC Back-UPS RS 1500VA USB/Serial 230V (UP-014-AP)
£202.95 £202.95
Subtotal £2,185.45
VAT £382.46
Total £2,567.91