so i am in the market for a new imac. replacing my aged g4 mini. i was looking at a 24" with an 8800 upgrade. but its out of my budget. so now im looking at refurbished 24" or new 2.6ghz 20" but i keep seeing people say that the 20" are no where near as good as the 24" but i cant find any evidence or reasons why this is? what are your guyses opinions of those who have actually used the two.