Poll was here.

Here is the codecs used:
Testfile01: WMP11 WMA 160kbps CBR
Testfile02: iTunes 7.62 AAC 160kbps VBR
Testfile03: SS 4.3 Atrac3+ 160kbps
Testfile04: Lame MP3 3.97 --preset fast medium

Thanks to those that voted. Hopefully there will be more participants on future polls. Poll #5 is still running.