Well, in regards to compatibility, I suppose this answers my question: Product Catalog
From that, I might want to have a look at Blackwire 700 Series ... but I much prefer the over-ear design to the on-ear when it comes to headphones, particularly those that cost more than $100 ;-)
I might end up just playing with the Voyager Legend UC then. I like the extra sensors included, so I know when I'm wearing it and should route audio through it, or having it "wake up" and listen just by putting it on.
But really, almost any scenario I can think of that would have me use this mono device, I could get by almost as well with a stereo bluetooth pair of headphones, right? Those Zik 2's had a sensor to tell when you were wearing them too, as do quite a few others, the RIG if I recall. Wonder if I could use Bluetooth Explorer to figure out the communication, if it's a standard, or if it's encrypted somehow...