If you are looking for an application geared toward managing extensive music collections, easy to use and with a comprehensive feature set - MusicBee is that application.
MusicBee makes it easy to organize, find and play music files on your computer, on portable devices and on the web.
- iPhone/ iTouch support
- Multiple Column sorting (using the Ctrl-mouse click action)
- Track Information tab in the now playing list, which can be configured for the
tags it displays (it replaces the Profile tab by default but you can switch back
by changing the preference)
- Mini-player has Show/Hide Now Playing List button
- Artwork-only layout
- 'New Tab' button
- Undo/ Redo function for the now playing list
- Various performance improvements
- Various GUI fixes, and a fix for m4a file being truncated in a certain
circumstance (also now includes validity check before replacing original file)
Product page: here