Have you tried VLC yet? It's free and plays almost anything. WMP is trash.
Originally Posted by Coma
One of the pros to using WMP (or Winamp, or any other DirectShow-based player) is that you can use ffdshow to decode the audio, and in turn you can use its many audio filters like the Crystallizer and Freeverb.
VLC and foobar2000 can't use DirectShow, so you're screwed on that regard. VLC IMO is horrible for video and I don't really see it as a music player. I mean, you can play audio with any video player, but that's not what they're made to do...
foobar2000 lets you keep tons of loaded playlists which is a very nice feature imo