I lost my z9 loved it - it kicked butt over everything I had tried (plantronics 655, 645, jawbone, several others) - it's so small
since then I've replaced it w/ the jawbone 2..
I also upgraded my phone to the sprint leaked 6.1 rom in the meantime (vs. a hacked 61 rom before..); so jury is still out - but my jawbone's outgoing sound volume feels really low!
The z9's replacement, z9i, is supposed to be in-stock starting monday - and one of the big claims is that it does better wind noise cancelling - I think I might have to give it a try...
-mark