Apart from Bluetooth what else do you need.
Small pocket size or larger man size.
Titchy keys or easy use keys.
Clam shell or candybar
VGA, 1.3, 2Mp, AF, optical or digital zoom or no camera at all.
1.8, 2, 2.2 or 2.4" LCD
Simple, no brainer UI such as a Nokia or infuriatingly stoopid like Samsung or Sony Ericsson.
Symbian, Windows or other OS.
etc
etc
etc
All personal choice really but try something like a Sendo X for underated but potentially a good deal (soon to be replaced) or a Siemens.