i'm just trying to decide what kit i need for upgrade to crossfire 3870's, do you reckon i should go for:

MSI K9A Platinum Crossfire (Socket AM2) PCI-Express DDR2 Motherboard
http://www.overclockers.co.uk/showpr...d=5&subcat=808

or...

Asus M2R32-MVP Crossfire (Socket AM2) PCI-Express DDR2 Motherboard
http://www.overclockers.co.uk/showpr...d=5&subcat=808

or....

MSI K9A2 CF AMD 790X (Socket AM2) PCI-Express DDR2 Motherboard
http://www.overclockers.co.uk/showpr...d=5&subcat=808

- AMD® Phenom/Athlon/Sempron CPU.
- HyperTransport 3.0 supporting speed up to 2600MHz
- AM2 CPU supports HyperTransport 1.0
- AM2+ CPU supports HyperTransport 3.0
- AMD® 790X and SB600 Chipset
- Supports Dual DDR II 533/667/800
- 1x PCI Express x16 slot with x16 operation
- 1x PCI Express x16 slot with x8 operation

also does anyone know about the operation speeds ie. would the first two motherboards run at 16x16 or 8x8, i've read everywhere but cant seem to figure it out :S

Thanks in advance