Hey, i now you are thinking "just stick to streaming VBR preset" but i noticed that it is medium quality with a higher frequency cut-off. I was just playin around with those switches and heres the best one i got to get somehow the same streaming vbr bitrate:
-vbrhi -qvbr 75
It is high quality with a 18Khz cutoff, sincerely i tried both and i think i get a little more perceptible artifacts in streaming preset. Ok now you are thinking "lets see some ABX" , well i've tried it, but i seriously couldn't notice any substantial difference but the above mentioned.
What do you think? preset or my switch???
P.S.: Dont bother to mention vorbis... i've already have a final decision...