So my school is running this insane deal on a NOS 20 iMac 1.8 -- 1300 with apple care, wireless keyboard and mouse. My question: aside from the significant price, are there significant reasons to go with the 2.0 vs the 1.8? I can't see the Mhz making that much of a deal. I'm also looking for reliability comments; for instance, did apple use a lesser quality LCD for the 1.8? Is the 2.0 revision running much better? Thanks.