What is the crowd's opinion of Play?

From 3.5 billion comments

I'm going to be a dick and recommend not using Winamp. You could try Songbird, Play, or Cog.

Songbird: http://getsongbird.com/ Cog: http://cogx.org/ Play: http://sbooth.org/Play/

Obviously, VLC works as well, and there are Xiph decoder packages that should make FLAC and Vorbis files work in iTunes, if you're into that sort of thing.

These might be simpler than what you're asking for, but these two players support a wide range of formats and they have clean and simple designs. Fast too:

Play and Cog.