Hi there, I'm looking for an upgrade for my old PowerBook G4. I could either get a rev D. 15" MBP, with a 2.2 GHz processor, 8600GT graphics and a LED screen, or a brand new 13" uMBP. Both will be roughly the same speed, but I'm not sure about the 8600GT, I heard that one had some problems. On the other hand, I don't know if the 13" will be big enough for me. So of you could choose, would you get a rev. D 2.2 15" MBP or a new 2.26 13" uMBP?