Hy,
I just downloaded Jet Audio from
http://www.jetaudio.com/
Its a (almost) perfect player, plays every single audio and video files...
So actually you dont need Realplayer anymore or Quicktime to play their respective format...when you want to play rm files, it will download the respective plugins.
Only thing i dont like is the fact that it does not support plugins (at least from what i saw). So in other term i cannot add DSP plugs to enhance sound like in winamp.
But still
One player to rule them all...