You won't be experiencing the full potential of this Mac until you go over to OS X though, these older macs are amazing machines and while 9 is OK, it is quite old-fashioned now and can't do a lot of what OS X can, and while with 9 you could be using any old PPC, with Tiger you know you're using something "Insanely Great" from the G3+ world when you see what it can do and feel the full force of just how powerful these old Macs still are...