new build spec?

[c61ll]

Think i have decided on my new build still pondering on a q6600 but other than that does anybody have any suggestions?

Cannot go any higher on the price

Gigabyte GA_P35_DS4 (Socket 775) PCI-Express DDR2 Motherboard

Corsair HX 620W ATX2.2 Modular SLI Compliant PSU (CMPSU-620HXUK)

Antec P182 Super Midi Tower Case - No PSU (Gun Metal Black)

Samsung SH-S203BEBN 20x20 DVD±RW Dual Layer Serial ATA ReWriter (Black)

Tuniq Tower 120 CPU Cooler (Socket 478/754/939/940/AM2/LGA775)

Intel Core 2 Duo E6850 "LGA775 Conroe" 3.00GHz (1333FSB) - Retail

Samsung SpinPoint T HD321KJ 320GB SATA-II 16MB Cache - OEM

Crucial Ballistix 2GB (2x1GB) DDR2 PC2-5300C3 667MHz Dual Channel Kit

Netgear WPN311 108Mbps Rangemax Wireless PCI Network Adapter

Microsoft Windows Vista Home Premium 64-Bit Edition DVD - OEM - 1Pk Sapphire

ATI Radeon HD 2900 XT SILENT Heatpipe 512MB GDDR3 VIVO TV-Out/Dual DVI (PCI-Express) - Retail

Microsoft Wireless Optical Desktop 4000 - Retail

Total £1025

Would i be right in saying that i should be able to clock the cpu to 400x9 (3.6ghz) and run the ram at 800mhz with this setup?

Thanks

 

[c61ll]

what are the exrea features on the ds4 and would the 520w be more than enough incase i want to upgrade cpu and graphics card at some point?

 

[c61ll]

extra cooling sounds good

Just read a review on the 6750 and said they clock and perform very well, any views?

Changed system to the 6750 with the corsair 520w and 4gb (4x1gb) crucial ballistix

£1023

 

[c61ll]

would 4gb ram get used in my system or is it overkill atm?
could always upgrade to 4gb at later date.