I'm not sure if the lack of DDR3 models is because Intel want to keep a recognisable differentiation between the 2 chipsets. X48 is supposed to be the high end, original talk was of it being ddr3 only, they couldn't get that because I think of pressure from motherboard manufacturers. They now have a 2nd easier chance, by making the p45 ddr2 only ??
Looking at other chipsets there never is that much between them, what difference there is gets exaggerated by the respective fanboys as you rightly say, doubtless X48 v P45 will also run . though with Nehalem waiting in the wings , it's an argument that won't go on too long.
