Does anyone have one of these yet? I'm looking into getting one to use for some recording/video editing. It's not a G5, but for $500..... Actually, I'd probably go with the $600 version since it's got a much larger hard drive. Do you think these will be sufficient to record/edit with? Of course, I'd probably be using an externam hard drive anyway. So I guess the hard drive isn't such a huge deal. So. Any thoughts?