hey all. i know this has been discussed ad nauseum but i think i have a different aspect of it. i'll be upgrading from the original core duo mbp and i would prefer getting one now before the "radical" new upgrade since i don't want to be the guinea pig for the rev A model. i remember when the first mbp came out, there was issues w/ heat. that was fixed by changing the size of the vents in the back. then there was the lower 1/3 yellowing of the new led screens... i haven't been keeping up w/ the latest kinks but are there any that's prevalent in the current mbp's that i should be looking out for before i buy? thanks!