Juggler, I won't argue or justify anything here, just know E6 pwns them hands down, lest what others would say. Do some R&D yourself, those who know E6, know E6.
W610i. The perfect phone for your needs. Its fast, awesome music and is only 1 of the 3 phones from the walkman range to haf an autofocus 2mp cam! Drop W830. Its outdated.