I used a couple of devices but not really as personal devices :

N770 (not phone)
Greenphone
Freerunner

but i started to become addicted with :

n810 (not a phone)
N950 (best ever)
N9
J1

+ others dusting in my : e7, bb10 dac, Nokia x, tizen z1, galaxy note and maybe a couple of others..

yes n900 is missing i would buy one if i can find a cheap unit.