Okay let it rip on me I picked the G3 600...the reason I did is because I had the same choice when I got my iBook...to get the TiBook550 or the iBook600. At the time the TiBook was only a DVD ROM...this was a week before they added the Combo drive and there was a lot more then $150 difference in the two. I went with the iBook 50 more MHz, a Combo drive, and a lot lower price. What did I loose going that way...a larger screen (which is not a lot bigger now with the 14" iBook out) and the G4 processor, which I know is better then the G3, but I use my iBook for AppleWorks, IE, Email, iTunes, iPhoto, iMovie. For me the G3 works well and for all I saved...it was not a bad choice