I used to use JayBird JB200 and liked it, but the battery died after a couple of years and they don't make them anymore. I don't like the square-in-the-ear style of their new one.

Now I use plantronics backbeat 903+. I like it too - music quality is actually a bit better than JB200 (which was rated highly when I had it), call quality a lot better, and whopping 7 hrs of battery life. Oh, and it charges thru micro usb (n900 charger will charge it, though it's charger will not charge the n900, even tho it's rated for 1A) And wonderfully, it was super cheap, less than half price of the JB200
As a downside it's a bit big and clunky. Doesn't look anywhere as slick as the Jaybird did. But I guess the size is needed to get that extra battery life. Also for my taste there are too many buttons on it - 5 in total.

Personally I'm not a fan of the S10 style headsets - I tried an S9 a while back and found not only BT receptions was not great, but also it was uncomfortable, esp while doing active stuff like running. And the bar behind the head made it practically impossible to wear while sitting in a tall seat (like on airplane or train) - uber fail for me.