After using ad15 i have to agree with params
i had a w800 and the volume is much better in nokia . It actually sounds more fuller then even ipods.(compared with ipod5th). (and do not flame me, that is what i felt). And if you use good quality desktop speakers. Then this will be almost perfect for you .
W800 when connected to pc speakers produced good sound but low volume. N70 just rocked.
still nokia should have given playback controls.