I got this one for like 65$ amazon has offer now and then and is worth it even come with the case the charges it to while not in use I really recommended works great with my iPhones
Plantronics discovery 975
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@French: Fair comments.
To your point #1, I agree that it's awkward to flip it open while wearing it. Typically I flip it open before putting it to my ear; battery life seems very good so this hasn't created any issues of running down the hx550 battery. In car or not, if a call comes in I find I can open the headset and put it in my ear with plenty of time for it to pick up & answer the call; if in the car it's usually sitting in a cupholder or tray so it's easily at hand.
An automatic volume feature would be nice.
My situation is very unique with the audio streaming factor. If I flip the mic open while driving the audio I want to listen to through my car speakers comes through the headset, which is why I was hoping to be able to leave it in ear and then turn on as needed.
Also, you mentioned something I forgot to point out about this headset...it has the best battery life I've seen reported for ANY headset that I've considered. Usually 5 - 7 is the norm and I believe the Motorola states up to 9.