Guden Oden said:S-E T610 for me. I like it, got pretty much all the stuff one wants from a phone and it looks cool too. Only thing that's lacking is it eats quite a lot of battery with bluetooth enabled (recharge every four-five days perhaps with very light useage). Also, the camera is pretty rotten. Res is low, and sensitivity isn't too good either, but it works.
Oh, and the camera DRINKS power, like a thirsty camel too.
I use the T610 as well (company phone). It's true that BT and camera draw lots of power, but: Speech time is awesome. I haven't measured it scientifically, but 6-7h (with good reception) are easily possible. Much better than most other phones I've used, which usually have good standby time, but are drained after 2h of talking.
Another big plus of the T610: Build quality. Apart from scratched surface (which is inevitable if you keep it mostly in your pocket together with the keys) its almost like new. No creaking, no loose parts, no problems with buttons or anything. In this regard it puts Nokia to shame.
Only gripe I have with it is the often unintuitive menu. Nokia still is king I guess when it comes to that.
A question at the end: I want to replace my private cellphone (Nokia 3510i) in the near future - and I'd love to have a phone with MP3 playback. I'm aware of the shortcomings (battery life, mediocre sound) MP3 capable cellphones have, but still:
Which ones can be recommended? Nokia 6230 comes to mind - are there better alternatives?