I'm looking into purchasing a new machine. I currently own an imac and it just isn't optimized to do what i want to do on it. Im mostly concerned about editing video with final cut express and being able to play some games without having to worry about meeting minimum system requirements. I like how you can upgrade the video cards and such with the g4's and the g5's, and that is mainly why I am going to get rid of the iMac for a different setup. Any help would be greatly appreciated.