What JABRA product is the absoutle best for the TREO 300?

I have the Free Speak BT200, the wireless headset. Does Jabra make a better product for the TREO 300? What about the Earwrap? Earbug? Or whatever? The way to rate this kind of product is to compare how well you can hear someone while driving, without having to press up the ear piece to your head every second. The other way to rate this product is to see if you can use the 1 button dialing, and benefit from the whole system.

Does anyone have any thoughts on this?