I currently use Burton Driver X and malavita for boots/bindings. Apparently Driver X are supposed to be pretty stiff. Personnaly I do not want to go any softer then that. I started snowboarding in hard boots so my flex values are a bit weird.
I usually ride a 170 that fellow softbooters call: a H beam with edge
I have a Coiler on order that's going to be 175.
The board I demoed was a 162. Checking lib tech's web site it looks like the 162 and 166 have the same weight recommendation. 1 finger length isn't that much more board to throw around. At 6'3 I got quite a large stance and leverage. Other "logic" behind the 166 is the 163w I have didn't have enough float for powder. Then again might have something to do with the board profile....hmmm...
Food for thought
Keep it coming !
EDIT: enlighten me: what is the TS weight reference you speak of ?