I went through the same question 4 months ago and went with the N900 because I thought that I was getting on the start of a new OS platform (Maemo) rather than the end of an old one (symbian). I had an e61. The N900 is a compromise, especially with the OS moving to Meego and the delay of the OS upgrade (PR1.2). It works as a phone and computer, but if you want a rock solid phone and a better keyboard, then go with the E72. I might still buy the N900 if I had it all to do over again, but there is definitely compromise on the phone and right now, it is not living up to Nokia's hype. However if PR 1.2 fixes several key items and Meego matures for the N900 (and there is dual boot), the N900 will be a tremendous platform. "If" vs. solid phone and best keyboard.