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get a cheap CPU lets say on AM3 setup like the BE 550 which is cheapo dual and will run everything just fine for the next two years or so yet and then you can just smack new 6core or a 965BE (or anything newer if it comes out) for almost no cash and have double or triple performance upgrade which will do fine for another 2yrs or so : )
I doubt it.
Changing socket too soon will **** off customers, which will make them move to the competition (AMD).
But remember, AMD's bulldozer will be on a new socket so why not Intel's Sandy Bridge???