Well "RealPlayer Alternative" would be the answer to the DRM issue
http://download.cnet.com/Real-Altern...-10698783.html
At the moment I'm using MediaMonkey because it has the file tree type navigation that I love in WMP10, but it's annoying that MM doesn't have gapless playback. Heaps of requests in their support forums but as yet no joy...
MM seems to be the closest thing I have found to WMP10 in the way it works and the sort features. I actually really like it!
For video I am using COWON Jet Audio - it plays everything I throw at it and has a good left-hand navigation system as well.
The search for player all-in-one happiness continues...