More RAM or Faster Processor

[mikeyboy911]

HI. I'm just about to build a new system

Proposed spec:

Tuniq Tower 120 CPU Cooler
(£35.24)

BFG nForce 680 (Socket 775) PCI-Express DDR2 Motherboard
£178.59

(GeIL 2GB (2x1GB) PC6400C4 800MHz Ultra Low Latency DDR2 Dual Channel Kit x2, (4GB total)
£293.72

BFG GeForce 8800 GTS OC 320MB GDDR3 HDTV/Dual DVI (PCI-Express) - Retail
£199.74

Intel Core 2 DUO E6600 "LGA775 Conroe" 2.40GHz (1066FSB) - Retail
£204.44

Seagate Barracuda 7200.10 500GB ST3500630AS SATA-II 16MB Cache - OEM
£93.99

My biggest dilemna is:

Would you sacrifice extra RAM (2GB) and buy a faster processor- even a quad core, or get more/faster RAM instead???

I have a Tagan 530w PSU- should I go bigger for the new build ie will twin 8800s run ok?

 

[mikeyboy911]

Thanks for the replies! So I can stick with the cpu, should I go for the 640 rather than 320 8800 gs and if I'm sticking with 2GB af RAM, how do I choose the best one to go for- Is it just get what you pay for, or is it like the cpu's- after a point, there's v little gain?