Do you think it would be good to buy a Power Mac G5 2.7Ghz with a 6800 GT and a 30" ACD now? Or should I wait for Apple's Paris Expo in September? After hearing about the Power Mac shortages, nVIDIA's new Geforce 7800 GTX, and the new Dual Core PPC 970 FX I am thinking there might be an update for atleast one of these things at the Expo. What are the chances of an update and should I just go ahead and buy this now or wait?