Good choice! I bought one last week and I have to say fantastic quality and quiet. 

I'm going for this one suggested above
http://www.overclockers.co.uk/showp...er 750 Quad-Crossfire PCI-E 750W Power Supply
It says in the blurb
- Quad PCI-E and 15 Drive Connectors
So that'll do me..
off to to the shop to rape the credit card..
Cheers