Scott,

If he threebets you can safely fold imo and OP feels he is bluffing too often. I either take the stance that i will call him down or make it expensive for him to do it, if i raise the turn i am putting on more money in the pot. I'm not sure either line is better than OP's, just throwing out suggestings about ways to deal with such a player. Also if Op plans to stay at the table for a while and shows down K high played this way it will do wonders for him vs this player. I'd be interested in your comments on what i have suggested.