All right.... I JUST ordered a used lime iMac g3 600mhz (has a new logic board) off of ebay. I know it's slow.. but I really don't have the cash to spend on a new computer that I may not like. Well...I'm a vista user, have always been with windows (tried linux - HATED it!) but i'm thinking my next computer is going to be that 24" iMac.. if i like os X that is. What are the main problems with switching? I know this mac is REALLY slow...but im not getting it to replace my PC, im just getting it to learn os X really...