Hi- I need a new Mac for work and am trying to choose between MBA 2.13 w/SSD or for the same price a 13" MBP 2.53 w/SSD. My IT guy at work is saying the Air is not as powerful or optimal as a workstation and is more of a "lifestyle" machine. However, from what I can see spec-wise these Machines would be just about the same in real-world performance since there's only a .4GHz process speed difference and then the 2GB vs. 4GB RAM. I will be running MS Office primarily and opening large PDFs, etc. plus Internet. Nothing really more. I prefer the size/weight of the Air but again my IT guy is making me feel guilty if I take it since he seems to think it's not as capable as the MBP. What do you guys think? Is the 2GB RAM the only real difference here and should I be concerned? thx!