I have a Dual G5 PowerPC with OSX Panther running. The machine runs like a champ for what I do with it. I would like to upgrade to the newest Adobe CS4 because I still use the first/original Creative Suite. BUT, is CS4 at all compatible with OSX Panther, or will I need to upgrade OSX? Also does anyone suggest upgrading to OSX Leopard from Panther; anything to be careful of. I am also concerned about Leopard's compatibilty with my current peripherals (few years old scanner, printer, drawing tablet) The primary use of this machine is for Graphic design, flash, web, and photo proccessing. Any advice? Thanks!