I am using 5.572.
As much as i like it it does have flaws. Hates playing videos, keyboard shortcuts are buggy, maybe a little too complicated for my liking.
For me a good media player sits in the corner with as minimal controls and features as possible. Winamp does this perfect for me. It sits at the top of my screen from the left to the right in a toolbar like skin. Everything else WimAmp offers is a waste to me except the playlist format which i love. I also love the way it saves the EQ settings for each track in your library. The rest of it is nonsense.