Im pretty sure i saw at AMD's webpage that mid 2007 is the release date for the opteron quad cores. I don't know if they are releasing an athlon quad core or something before that, but thats the time frame. Go ahead and buy your PC. By the time your ready to upgrade the prices on quad cores will have dropped and you could pick up a motherboard and CPU for a reasonable amount by then, and be assured that any bugs will be out of em. Plus, are you really going to be doing sooo much multi tasking that you need a quad core over a dual core?