I want to drop a 3.06ghz w3550 into an entry 2009 Mac Pro. Its a good upgrade for my budget, I think. I also dont want to "keep the other CPU" around, for the sake of swapping back if I need to redeem Applecare services. I'd rather sell it on ebay to make back some of the money. I'm covered under the 1 year until August, at which point I'd swap the CPU. Is it safe to assume that after the first year of consistently running the machine OK, its going to last me into the future with minimum problems? This seems to have been the case with most of my computers. Good or bad idea?