I'm also using JRMC. Version 19 in my case. I prefer it's sound over all the others. I also like that it takes VST plug-ins. Best of all though is that I can completely avoid iTunes and navigate my music collection via the actual folder structure.

The last couple of weeks though I've been experiencing a problem with it. For some reason it will not shut down. I always need to Force Quit on it. I haven't changed a thing in it's settings so I'm suspecting it's down to an OS X update. Damned annoying.