I've had a Treo 600 and then a 650, which has just died by non-stop rebooting itself. I hear criticism and hedged praise for the 755p. Before I upgrade, I wonder if anyone in this forum could advise which is the best available Treo model for a Mac user. I would also want to instal Documents to Go, and to have it sync with Mac (either it's Mail/iCal or Entourage for Mac). I have no problem about SD vs mini-SD cards. Any advice gratefully received.