I need to buy a new MBP in the next few days and was reviewing the specs... If I customize the highest end 15" (with a 3.06GHz processor, etc..), and a 17" with the same 3.06 processor, etc.. It seems the only difference between them would be the screen size... It seems both have the same graphics chip, processor.. etc. Is that correct? Are people aware of any subtle differences? Like screen quality, etc? The 17" would be just a couple hundred dollars more than the 15".