I tested the following formats:
LAME 3.98a2 -V7 --vbr-new
aoTuV Vorbis b4.51 -q2
MPC 1.15v --quality 3
Nero AAC Internet Profile
WMA Std q50
Shine mp3 as Anchor

I was only able to hear a difference between Nero and Vorbis once, and, trust me I tried very hard to tell the top two competitors (which I assumed were Nero and Vorbis) apart in every test; the difference in final notation must be within the margin of error.
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