When i first started editing, it was on a g4 w/ only 512mb of ram. I got my G5 this summer and upgraded to a gig of ram, and as far as editing goes, i dont really see why you'd need anymore. Final Cut never crashes, and rendering doesn't take that long. I mean, yeah it'd be nice to have 2 or more gigs, but how the hell would you ever need 16 gigs?