Besides mp3, my mp3 player also supports mp3pro and wma. Both of them offer better quality than mp3 at low bitrates (64 - 128), and I was wondering which one, in your opinion, would yield better results: vbr mp3pro or 2-pass vbr wma?

Thanks for your opinions!

These should provide some insight:

64kbps: http://ff123.net/64test/results.html
128kbps: http://www.ff123.net/128tests.html
128kbps: http://www.ff123.net/128test/instruct.html

In short though, mp3pro performs better at 64kbps. At 128kbps it'd probably be better to use regular mp3, which may outperform WMA.