Upper end black MacBook or MacBook Air. 5lbs vrs 3 lbs ... not a huge deal same size screen... air has a "better" screen battery life? Here's what I'm up against. My company is going to web-based customer management set up and I'm getting a mac. Price really isn't an issue. I want to keep the weight down as much as possible, but 3 versus 5 ins't a huge deal. Screen size of 13.3 is perfect. My only apps for this baby is customer management, ocasional powerpoint, web surfing, email. I will rarely, if ever, need a disk drive. Hard drive space is important though, so the Blackbook looks better on that one. I hate running out of room. I'm worried about the newness of the Air, the reported "issues" of fanspeed, core shut downs and what not. Just enough bumps that I don't want to be a beta tester for the new product. Blackbook for me?