Hi, i think this belongs more in 'music science' than 'portable audio'...correct me if I am wrong. Does 128 AAC sound better than 192 MP3?? Does VBR sound better than standard bit rate? What format and bitrate do you rip your music in for the ipod or portable mp3 player? (I have no idea what FLAC or apple lossless but am open to anything) What would be the "sweet spot" between quality and size? Thanks.