CDex<BR>Lame V1.32<BR>44khz<BR><BR>WAV file - 88.3mb<BR><BR>min:96kb/s <BR>max:160kb/s<BR>q=0<BR>VBR 0<BR>9.9mb<BR>VBR 5<BR>9.5mb<BR>VBR 6<BR>7.3mb - good quality ...
In theory CBR 320 kbps is better quality, since it's the highest the spec supports. In practice you're not going to hear any difference unless you're some freak of nature.