Im considering buying a new 20inch imac, but I feel that I should await for MacWorld later this year to hear about any new chipset updates with the penryn processors or I also heard rumors about black imacs with new isight cameras in them coming out. I dont wanna spend 1800bucks on a computer when I could wait 2-3months and get something a bit more top of the line for the same price. someone wanna give me some insight?