tough spot in blind vs. blind battle on the bubble

[diskopoker]

i am at my local casino last night in a $60 freezeout.
final table, 9 left. top 7 get paid. I have 66k, blinds are 3/6 (prob about 5th in chips)
i am in BB with J3h, everyone folds to sb who limps. (sb has me covered but doesnt seem very good) i think about raising then decide to see a flop. flop comes down Ah Qh Jc
sb checks and i bet 6k
sb check raises me to 18k
if i call i have 42k behind. we are almost in the money.
i think this is a particularly tough spot. what range of hands do you put him on and what is your move and why?