I use Thomastic-Infeld Jazz Flats... the B is a .136, which seems just crazy big, but is actually very low tension on our 32 scales. If you prefer a roundwound that requires a little more effort to play, then the Super-Alloy set is the ticket at a .125 B string. (friendlier price tag too)
On the advice of another Club Member, (maybe Dave Houck?) I tried a set of the TI Jazz Rounds, which only has a .118 B. It feels and sounds fine on a 34 scale Gibson, but my medium-scale Persuader didn't respond well at all. Not sure how much the scale had to do with it... they just had too much sizzle/zing/whatever. Went back to the Jazz Flats and stayed.