I drove the people at the store crazy trying on all the headsets on one afternoon, and I ended up buying the first one I tried on, the H700.  It was the lightest and most comfortable BT headset I've tried.  I wear sunglasses a lot and the H700 does not get in the way of the bows, I was quite surprised by this.  Finally, a BT headset and sunglasses can co-exist peacefully!.  I own the Motorola E815 phone and this headset and phone sync seamlessly.