Since the Geforce3 isn't shiping in the BTO G4s for a while, Mac OS X will be out by then. But when i get my G4, should i go through OS 9.1 setup, then upgrade, or should i just do a fresh install of OS X? I'm not this great Mac guy, i actually have no clue how to erase the HD and do a clean install of OS X, but what would be better? I know on Windows machines it's better to do a clean install instead of just upgrading (I did 13 in a row before Windows worked again). But with Macs, am i better off erasing the preloaded 9.1 and immediatly install OS X or is upgrading just as good?