Which one? This will be used primarily as a secondary machine as something to fiddle with and to run some old classic games.
the dual g4 will boot OS 9, and it will hold 4 hard drives and 2 dvd drives. i have 3. I also have a G4 mini hooked up to my tv. Its great for a media computer (non hd). But the dual g4 is the ultimate OS9 gamer, and still runs leopard great with 2 gigs of ram.