Hey DM,
So if I understand correctly, you can use play to load format and organize your storage and playlists and bypass I tunes altogther? The bad news is no cool graphics and you can only load 10 songs at a time. I can live with that if its easy to use. I'm from the world of little silver discs used in a high end single box (Audia Flight CD2) player. I do not want to have to learn to Mac code (not sure what even lurks behind that cool Mac GUI) to listen to my rig after a long day at work.
Yes, you can bypass iTunes altogether. I only use iTunes to play internet radio stations.
Play.app has library functions (sort by Artist, sort by Album, Search, playlists, etc). The only thing missing is Album Art (which I personally don't miss).
I'm not sure about your "10 songs at a time" thing. I use the beta/unstable version of Play.app which is newer and better, and is not unstable at all. It has no 10 song limit. I throw 20-40 songs in the queue on a regular basis and save them as playlists too, no problem.
IMO, it is the best sounding player. If you can live without Album Art, it is definitely worth demoing.