Why do you use Ogg Vorbis instead of MP3 ?
OGG audio files sound much better than MP3 ones at lower bitrates, that’s a fact. So you may get MP3 equivalent results with smaller files. And as far as my music is concerned, it’s easy to check. “Unsealed” in OGG (15.8MB) sounds as good as a 20MB+ MP3 rendition. Ogg Vorbis is better, period. But even so, that’s not the core reason. I simply use Ogg Vorbis because it’s an open and patent-free format, and I like it. MP3 has been patented. Also, since the release of Firefox 3.5, Ogg Vorbis files are directly playable by that browser, which is very convenient. You can go get it if you don’t use it already.