I agree with pretty much everything said above.
My take, is that its best to stick with the Intel Chipsets right now. X48 if you want to Crossfire and P45 if you will likely just roll with one card. The P45 models still allow Crossfire, but not with both at 16x pipeline. Still pretty solid performance from either board. Both of those chipsets have DDR2 and DDR3 models that you can choose from.
NVidia's chipsets are far more buggy than the Intel offerings. SLI has no distinct advantage over Crossfire. ATI has a rock solid answer for every card NVidia has out. What made my decision in the end is that ATI came out with pricing that was kickass and NVidia had to cut prices to compete. To me, that means NVidia was happily gouging pricing until ATI stepped up and did things right.
