In balance...
The N80 is an excellent phone, especially when you upgrade the firmware (pretty easy).
Excellent screen and has wifi.
With a 2gb card in mine and using an external GPS, I have got Tomtom6 on it, 300 mp3s and 12 30minute tv programmes on. LCG jukebox and Smartmovie are excellent apps you can install to replace the Nokia music player and realplayer. Got loads of other useful apps too such as OfficeSuite.
Half decent camera too with proper flash.
Best phone I've ever had though I didn't like it that much at first.