I haven't had a problem with my HTC Desire HD cutting out over bluetooth, so I'm afraid I haven't had a need to search out a different audio player. Going slightly off topic, if you need a decent replacement for the built-in video player I can recommend MoboPlayer. It's free and can play Quicktime (mov) files, Windows Media Video (wmv) files and lots of others. Very useful just in case you get a video file you can't normally play.