Honestly, my advice in these situations is to download the latest Media Center (which right now is MC32) and try it in its 30 days free trial and use it and explore it to see if you find anything you like. Just make sure you do a library backup in MC14 then restore that library backup in MC32 so all your settings and playlists and everything else transfers. Or if you don't want to try it you can look at all the release notes for MC15 through to MC32, but that's a lot of stuff to sift through.
The upgrade from MC14 to MC32 is going to be a big one. Lots of things have been added over the years for audio including the WDM driver, SoX resampler, TPDF dithering, HDCD support, memory playback, etc.
