i just sold a pretty beefy PM setup with tons of storage and ram and a 20" aluminum display. i'm going to "downgrade" to one of the intel imacs and save the rest of the money for the next great thing that steve will unveil later this year (i'm tepidly looking forward to some kind of multimedia or tablet device...) anyway, i know the answer to this, but i'll throw it out there. which scenario will cause me the greatest "aw, crap" moment? is it buying the 17" and later wishing i had spent the few hundred dollars to get the 20", or is it buying the 20" and realizing that it's not that much better than the 17" and i should've just gotten the 17"? yes, some of you will say i'm crazy to even think about getting a 17" after my 20" cinema display...but i'm wondering if there are people out there who got a 20" iMac (intel or G5) and later wished they had gotten the 17". and if so, what are the reasons?