Bought a Sony TR series about a year and a half ago - predecessor to the TX. The new generation of ultralights are simply unbeatable for road warriors. The combination of the ultralight and blackberry means that I can be fully productive virtually anywhere in NA, Europe or Asia. Any of the models people have described on this thread are up to this task. Distinguishing factors I would look at are battery life (look for 4.5 hrs +), screen quality and whether the DVD is onboard (better) or outboard. Bluetooth and other bells and whistles (like the ability to start the DVD without booting up the computer are not really that important).