Pf, I'd consider calling too. Most likely 2 pair. You got 4 outs to a straight, 3 outs to top 2 pair, 2 outs to a set. You need to invest $40 into a $115 pot, which is roughly 1/3. Add in the fact that he might not have you beat yet but rather is chasing his own straight with KT or something. So yeah, I think you can call if you should feel the need.