[Shillx]

A bet like this means the villian:
Found a draw
Improved from a marginal hand to a good hand (not the case here)
Has a monster hand and wants to keep you around
Is betting a weak made hand that he doesn't want to call down with, but is willing to invest a bet in hopes that a) you fold, or b) you raise so he can safely fold knowing he is beat.

Unless the villian has KK, I think you have the best hand in the spot. Folding is out of the question for me, and his agression level determines if I call or raise here. If I know he will fire on the river with a worse hand then mine, I'm leaning toward calling.

Brad