Thanks for the suggestion for this particular model ! I ended up buying the Plantronics 903+ model, and I like this a lot! Very compact and fits reasonably comfortable. The link you gave is for the 903 model, but at the Apple store, they only had the 903+ model which I got. The 903+ (Plus) model offers additional features, such as a female voice that "speaks" to you and tell you how many hours battery life remaining, advancing to next track, you're a hot stud...err, scratch that last item! Hyuck hyuck!
Only minor drawback is that I normally carry my Thunderbolt inside the right trouser pocket. When I'm walking around, I notice a lot of skipping and pauses, and sometimes a lack of connection. I'm guessing the bluetooth connection has problems going through my body?? I even tried placing my Thunderbolt on the left side trouser pocket but still had skips. But when I'm sitting still, the music seems to play well.
Other weird thing is that when I'm pressing the button on the unit to advance to next music track, for some strange reason, my Winamp app will be used instead of the built-in Music app. Does this happen to you too? Also weird is that 2 songs could be playing simultaneously if for example I'm playing an MP3 song through the Music app, and another different song through Pandora app.
Thanks, Casey