Stupid question time ... since you have 4 PCI-E connector what type of Power supply are you recommending? I don't think I've seen an estimated power draw yet but do you think a standard PC 700W PS with PCI-E splitters would work?
Hopefully not. 
While testing needs to be done to see how far it can be pushed, we're expecting numbers in at least the same ballpark as what HashFast has been claiming for their Evo board. Look at having about 1J/GH if it's pushed up to 700GH/s, so I would budget a PSU in the 850W class or up. I wouldn't run using PCIe splitters.