Would you happen to know of any affordable motherboard with, oh, let's say 3+ X16 slots? The ASrock board seems great, but then I end up having to set up racks and whatnot, vs just setting them on top of boxes with the cards directly in the motherboard. I do have 3 risers coming in, so I suppose I could set up a whole other rig with one of those boards, while having one card directly in the mobo...

I've already set up a rig with 2 cards in an LGA755 mobo and it seems to be alright, but only because I got the whole thing for a good price, so it made sense. But having more cards directly in one mobo would def be preferred...