I remember trying that one, too, and, though I can't remember now why I didn't like it, there was something quirky that bothered me.

However, as is typical of such things, I found Whamb shortly after posting this, and it seems pretty good so far. It seems to have some of the playlist quirkiness that Audion had, but it seems less intent on it. It seems to be doing not too bad with CPU usage, too.