I was wondering what everyones experience is with Mac's Revison A machines. I am trying to figure out how I want to replace my iMac 500 and I'm not sure what to do. Of course I will wait to see what they look like and what the price and specs are. But, I'm a little scared of what the Rev. A would be like...heat, low specs, other issues...??? So, I'm just wondering if people often have bad experiences with them. If it sounds like a good idea to not jump on the first revisions I'm going to get a used PB and wait for the iMacs to be updated for the first time.