I think before this answer can be answered to satisfaction some clarification is necessary.
Firstoff, what operating system are you using?
Secondly, are you looking for an audio player, all-purpose media player, or a modified media player (not necessarily one that can do or play anything, just do certain things well).
and Thirdly, What are you looking for in an audio or media player? More or less everything that was in Winamp? More or less? Do you like strong visuals or a more plain exterior and does it matter?
Until you answer that question crofty I can't give you the optimum answer for what you're looking for, just a long list of "possibles", which wouldn't help you much at all. Once you make a decision on those fronts then I'll be able to answer your question with some amount of satisfaction.