I've been reading a lot about PSUs on this forum...a lot of folks are advising against using a dual-rail PSU for SLI. From what I've been reading, having 25a per rail is preferred, but on dual-rail PSUs it only amount to about 18a per rail.
I'm saving the cash for my own SLI system as well, I'll be using the OCZ PowerStream 520W. It has the 24-pin connector, and 33a on the 12V rail.
I'll try to dig up the thread I was reading about power issues with SLI....which board are you going to get? A8N-SLI Deluxe?