Not sure if I should sell my powermac in my sig. For the new iMac. I have a 2.16ghz MBP c2d w/ a gig and it seems a bit faster thsn my PM. So my question is, should i sell the PM tower and get the new iMac? I have a second internal HD that i'm assuming wont be compatable with the iMac. I need some opinions please.