I use a Psion. Had a 3a, 3c, 5 and currently a Revo and I could recommend any. The Revo is compact but can get e-mail anywhere, have my logbook on it, rosters, spreadsheets, word processing plus an alarm clock!!! The 5 is a bit bulky, but nicer to use and has a backlit screen. Depends on the size of your wallet.