Best Memory I can Buy

[Exibit]

Hi Guys

I'm after some help on choosing DDR2 memory, I want the best memory I can buy within my budget of £340-00, looking at buying 4GB,

I would also like the memory to run in SLI Mode.

Will the types of memory below run at 1150MHZ with my MB and CPU or will it just default back to 1066MHZ and if so would I be better just to look at memory running at 1066MHZ

Looking at the following
Crucial Ballistix 2GB (2x1GB) DDR2 PC2-8500C5 1066MHz Dual Channel Kit
http://www.overclockers.co.uk/showproduct.php?prodid=MY-093-CR&groupid=701&catid=8&subcat=817

OCZ 2GB (2 x 1GB) PC2-9200 1150MHz Passive/WaterCooled Dual Channel DDR2
http://www.overclockers.co.uk/showproduct.php?prodid=MY-084-OC&groupid=701&catid=8&subcat=817

OCZ 2GB (2 x 1GB) PC2-9200 1150MHz Reaper HPC Edition Dual Channel DDR2
http://www.overclockers.co.uk/showproduct.php?prodid=MY-089-OC&groupid=701&catid=8&subcat=817

OCZ 2GB (2 x 1GB) PC2-8500 1066MHz SLI-Ready Edition Dual Channel DDR2
http://www.overclockers.co.uk/showproduct.php?prodid=MY-082-OC



My PC Spec is as follows

Asus P5N32-E SLi nForce 680 (Socket 775)
Intel Core 2 Duo E6850 "LGA775 Conroe" 3.00GHz (1333FSB)
Zalman CNPS9700-LED Aero Flower
BFG GeForce 8800 GTX OC 768MB GDDR3
Western Digital Raptor 150GB WD1500ADFD 10,000RPM SATA 16MB Cache
Seagate Barracuda 7200.10 500GB ST3500630AS SATA-II 16MB Cache
Corsair HX 620W ATX2.2 Modular SLI Compliant
Antec P-180
Microsoft Windows Vista Ultimate 64-Bit Edition
Dell Ultrasharp 2407WFP 24" Widescreen LCD
Razer Tarantula Advanced Gaming Keyboard
Razer Diamondback

 

[Hxc]

The 1066mhz is quad pumped, meaning you only need memory running at 266.5mhz to use the processor at it's default speed. 6400 is best for this, anything above that is a waste of money tbh.

Ballistix 6400 tbh.

 

[helmutcheese]

PC6400 (800mhz) is cheap, and gives you OC headroom to run 1:1.