Okay, I'm buying the new iMac and I'm going to make it last 5 years. (The 333 did it, so why not this!!!) So, my question is which screen size should I get. There is no practical upgrade between the two except for the fact that on the 20" the 160 gig hard drive is standard. But, I want the 20"!!! Can you give me any good reasons why I should spend the extra $310 ($400 -$90 because I was going to up the HD)? Please help me!!!