Previous I have never used rhythmbox by default because it seemed to be lacking in features to me. Just my personal opinion.
With rhythmbox back in 12.04 will ubuntu give it some attention to give it some usability one thing that was majorly missing on my last use of rhythmbox was an equalizer which is the most basic of requirements for an audio player let alone a preamp.
I was having an issue with the pulseaudio-equalizer an rhythmbox, sound gets really crackly but so far only with rhythmbox, youtube sounds just fine. I tried installing the rhythmbox equalizer thinking I can just use this for now as a work around, I don't mind the extra few clicks to disable one equalizer for a short time then enable it later.