Can you please rate this system and advise

Hi all,
I am ordering these parts to build my computer next week,can you please advise whether it is good or could be better
Processor - E8400 = £176.24
Motherboard - Gigabyte GA-P35-DS4 (Socket 775) PCI-Express DDR2 = £111.61
Hard Drive - 2 X Seagate Barracuda 7200.11 500GB SATA-II 32MB Cache - OEM (ST3500320AS) = £74.01 Each
Power - Akasa Ultra Quiet 500W Paxpower Active PFC ATX2.2 PSU - Black Nickel = £52.86
Ram - 2 X OCZ 4GB (2x2GB) PC2-6400C5 Dual Channel Vista Gold Series DDR2 (OCZ2G8004GK) = £54. Each Set
Windows Vista 64 = £70.49
Graphics =BFG GeForce 8800 GTS OC 512MB GDDR3 HDTV/Dual DVI (PCI-Express) - Retail = £191.51
Case - Antec 900 = £65.79
CPU cooling - Arctic Cooling Freezer 7 Pro CPU Cooler = £17.61
Arctic Cooling MX-2 Thermal Compound = £4
Keyboard - Saitek Eclipse 2 Illuminated Keyboard - Blue/Red/Purple = £23.49
Mouse - Razer Krait 1600dpi Professional Gaming Mouse - Retail = £23.49
Speakers - Logitech Z-4e 2.1 Speaker System = £52.86
Monitor = OcUK Value Hanns-G HW191D 19" Widescreen LCD Monitor 2ms Response - Silver =£111.61
Burner - LG GSA-H55NBRL 20x DVD±RW IDE Dual Layer ReWriter (Black) - Retail = £19.96
Dvd = LG GDR-H30NBL 16x DVD-ROM (Black) - OEM = £11.74


Would I be Better getting a pre Built Quad or using a sound card ie creative X-Fi
I want speed and no buffer underuns ect
Many Thanks

The Akasa PSU is a brand I am not familiar with, but looking at the specs, it looks like it can deliver at most 24a at 12v. That is marginal at best for your vga card. I would suggest the corsair 550VX which has a 41a 12v rail.

The rest of the parts look very nice.

Onboard sound is very good; try it first, you can always add a sound card later.

For gaming, the E8400 is better than a quad unless your game is optimized for more than 2 cores like FSX.