The 15.4" is too big, and the MB Air is a joke with 1 USB and no ethernet and replaceable battery. The Macbook's glossy screen and cracking plastic is a no-go either. Glossy screen in a car is god awfully annoying. Where's the one inch thick 13" MBP? There's a HUGE market for a professional model of this size (just look at the high-end competition from the Thinkpad X300, Sony Z-series, Dell Latitude E4300). I'd buy one in a heartbeat.