Hi,
I checked this page:
http://www.hydrogenaudio.org/forums/index....showtopic=28124
and it has the switches for lame 3.97b1
Switch equals preset target kbit/s Bitrate range kbit/s

-b 320 = --preset insane 320 CBR 320
-V 0 = --preset extreme 240 245…285
-V 0 --vbr-new = --preset fast extreme 240 245…285
-V 1 210 220…260
-V 1 --vbr-new 210 220…260
-V 2 = --preset standard 190 170…210
-V 2 --vbr-new = --preset fast standard 190 170…210

I am satisified with the 170-210 range. Which of the two should I use?
--preset standard
or
--preset fast standard
and what's the difference between them?

I'd use --preset fast standard as it's faster and possibly higher quality. --preset standard uses the old vbr engine which is more tested.