Recently I have been encoding my CDs with oggenc -q2 found it crappy tried -q3.
Then I remembered the listening test http://www.rjamorim.com/test/multiformat12...28/results.html in which a modified libvorbis won first place.
Apparently it was tweaked for <=-q4 so I thought I was using -q2 -q3 why not try it out.
Compared my old -q3 encodes with aotuv -q3 encodes. The tweaked libvorbis/oggenc produces smaller sizes plus better quality. what a treat!

QUOTE
Vorbis aoTuV is the total winner of the Multiformat at 128kbps public
Listening Test below:
http://www.rjamorim.com/test/multiformat12...28/results.html  


libvorbis patch for *nix :
ftp://ftp.iDaemons.org/pub/distfiles/libv...uv_b2.patch.bz2

win32 binaries:
http://www.geocities.jp/aoyoume/aotuv/
oggenc_aoTuV_b2.zip

note:
Use of bitrate management mode is not recommended.