I'm a photography student and my 4 year old dell isn't cutting the mustard anymore. i want to get a powermac. i'm looking for advice as to what specs would be good to start with. the powermacs seem to have lot of potential life as far as upgrading goes. i'm leaning towards the dual 2.3, 2g ram (possibly only 1G), 250GB hard drive (i store most of my photos on cds), ati radeon 250mb, 16xsuperdrive. obviously this is a monster of a machine but i'm feeling apprehensive about the purchase for obvious reasons. any suggestions?