I want to upgrade my original first gen MBP and am looking at either: 1) MBA rev B 2) Penryn MBP last gen glossy (since it is not glass) Here are my key criteria: - Less heat (most important!) - Battery life - Wifi reception - Good screen for watching videos etc. Portability is a plus since I am seriously considering the MBA although the line issue on the screen is holding me back. I am not a hard core gamer so frame rate of quark etc is not an issue. Video editing is also not a concern since we have an older imac in the house to handle any imovie or handbrake I want to run. I just want a good laptop to bring with me when I travel and around the house that is cool (or at east not hot) with good wifi, screen and battery life. I keep going back and forth between Penryn (stock is running out) and the new rev B MBA without making a decision. What is your take/advice? Would really appreciate if any first gen MBP owner who has upgraded could chime in as well! Many thanks!