The S9? I'd recommend it. People were saying that early versions (i.e. the black and orange one that came with the Z6) sucked, but the one I had was good. I bought the red and black one new from Future Shop, but then returned it as I got a much better deal for a rarer all-black version on eBay. Voice quality is OK, and it comes only out of the left ear. People say that the other side can't really hear you well (the mic is in the right ear bit), but I got no complaints. Music quality is astounding for an A2DP thing, great bass and range with the P905i.

There are probably better alternatives out there, but I'd recommend the S9 if you are fairly active (I plan to use it on runs and at the gym) or if you want something small, as I've seen nothing else that doesn't give you Princess Leia buns or requires a bit of wire to a clip thing.