My son is a genius pianist and is composing high level classical pieces on piano. He dreams of composing fully orchestrated pieces centered around his piano compositions, and I ordered the GPO for him for Christmas. The problem is, I have no idea which computer to buy him to go along with this program! He wants a MAC (that's what I use), but everything I am reading is extremely confusing as to which MAC will support the full orchestra. Some sites say you need a MAC Intel, but that Leopard doesn't support it. Don't all new MAC's come with Leopard now? Do I have to buy a used MAC with the older operating system? I don't want to give him a used computer for Christmas, though! Also, how do you play the piano with GPO? Can he somehow connect his electric keyboard to the computer and use GPO with that as he plays or something? Sorry to ask what probably sound like idiot questions, but I am like a fish out of water with this stuff. Any help would sure be appreciated! Thank you!