Before my current set, I used some Motorola S9s. They were not as good as they advertised. The sound quality was ok, battery life was about 6 hours, and they were definitely not sweatproof, as they claimed. After about 3 or 4 weeks of workouts, they crapped out on me. After a particularly sweaty workout, the controls refused to work. I couldn't even get the power buttons working to turn them off. And I had lost my receipt so there went any exchange.
I ended up buying this pair
by Rocketfish at Best Buy. So. Much. Better. The sound quality is fantastic, they are very comfortable, and the battery life is pretty much as advertised. All the music and phone controls are on the left earpiece, so I don't even have to unlock my phone to skip a track or raise the volume. And the microphone is excellent; sometimes the person on the other line thinks I hung up on them because of the lack of background noise coming from my end. These are not necessarily noted as being sweatproof, but I've had no problems whatsoever with sweat after nearly 3 months of use. However, as a precaution, I still wipe them down when I feel they may be getting too wet, and I bought a couple of these covers
to make sure sweat doesn't get into the charging port.
Oh, and for $10 more, you get a no-questions-asked, 2-year replacement plan.