hi my neightbor is selling his two imacs. 1) iMac G4 320GB hard drive, 1GB of RAM and to Leopard operating systems. It has the G4 processor. it also comes with speakers and video cam. and wireless network connection. $350 2) iMac G5 iMac G5 17" 2GB Ram 150GB HDD Bluetooth Superdrive Built in iSight Webcam Remote $450 which one should i get? im really confused on why the G5 has less HDD memory than the G4. i would have thought that it would at least have 200GB. my macbook has a 160 HDD.... anywho is there any way i can add more HDD? another thing is that i do have an external drive that is 1T (terabyte) so not sure if that helps. one last question i promise, i upgraded my macbook ram to 3 GB it had 2 GB but i did not know that Apple put 2 1GB sticks in there so now i have 1GB stick of ram, i was wondering if i can use that on one of those iMacs?