Which do you think is better?

1. Motorola Ht820
2. DR-BT21GB by Sony
3. Hbh-970 or 980
4. Plantronics 590A

Accoring to their style, sound quality, performance, battery life.

What would you think? I want to have your opinions. And if you have other things you know other than what it is stated above, just feel free to post. Sorry for the bad english.