I'm trying to find a suitable motherboard that'd run 3 5870's OR 2 5870's + 1 5970.

I do not plan on expanding past 3 cards in this box, so it seems a 4-slot board is excessive. I'm having trouble finding a suitable 3 slotter-though, any input would be appreciated.

Edit: Unless a 4 slot rig might be more cost-efficient in the long run? Not trying to spend unneccessarily though.

Any other boards that might accomodate just 3, suitably?