I am going with the G5 because they are so quiet. I am hoping that panther speeds things up a bit. In the latest macworld the 1.6 held up nicely against the dual 1.42. If it is on par and quiet, than that is cool with me. Plus my pops has a dual, so I can always go over to his house if need be. (or swap em and hope he does not notice!) 🙂