This question is present as a matter of historical interest.
It is inspired by Amarok 1.4, focusing on a fast and easy-to-use interface for searching and playing music. The bug has since been fixed but now the packages have been simplified, it might never return.
Tested many media players before and still stuck on Winamp with no real solution for Ubuntu. I have very mixed feelings about Banshee player's quality, design and features.
Clementine import my music awesomely fast compared to amarok. Important feature configurable (like behavior when double click on album). Bottom line -- could (and should, almost must be improved (after all Canonical chose that player to replace Rhythmbox)). ), not so nice way to manage radio streams and/or audiobooks (no import/export) no nice refresh method. Rhythmbox - Another contender for managing your music library, I have found it to be a bit cumbersome when tagging mp3 also it does not like to handle a large library (yet again that is my opinion).
There are many cool features, but these inabilities just ruin my impression. Front end for MPlayer, well designed, allowing on the fly skins and well set out preferences including editable shortcuts. Deadbeef audio player that has all the features you are describing: Recent versions (now 0.6.2) bring it even closer to the purpose of becoming a Foobar2000 alternative by the 'Designer mode' feature that lets you add or remove features.
The main addons like the File browser and Infobar (lyrics and biography) can be added in this way.
More plugins: Media Player - https://launchpad.net/gnome-media-player This media player supports the vlc, xine and GStreamer engines for playing media.
Since some file formats play well only on a certain engine, this media player was made with 3 engines, so that the user can select the required engine required for playing a particular file type.
It also has an engine auto select mode, in which the player automatically selects the best engine for the particular type of file being played. p=/wiki/page/home Another great music playing application, constant updates from the author who does all of the work himself, and takes on board suggestions from users.
If your music collections is on a remote server (very handy to control you music from everywhere in the house) then Music Player Daemon (mpd) is a go to, full documentation and list of client there: mpd It has a nice GUI.