I really want to buy a 20" iMac now but I would kill myself if there would be an update somewhere between Macworld '07 and Leopard (which I think there wil be). I'm not a power user but I do want a good machine and yes I know that the current iMac are good but I have a feeling that there's going to be an update somewhere around Macworld. I can wait a few months but what will I be waiting for? what would the iMac's of 2007 be like? I'm thinking about a new graphic card since X1600 is getting pretty old and maybe a new or higher processor. What do you think will be the new specs? And should I wait or not?