Merge, $0.25/$0.50 No Limit Hold'em Cash, 6 Players

BB: $133.69 (267.4 bb)
UTG: $50.70 (101.4 bb)
MP: $53.95 (107.9 bb) Hero KhTh
CO: $39.10 (78.2 bb)
BTN: $51.14 (102.3 bb) Villain is 20/14 over 80 hands. He's a good thinking regular. Better than a decent reg
SB: $34.01 (68 bb)

Preflop:
UTG folds, MP raises to $1.50, CO folds, BTN calls $1.50, 2 folds

Flop: ($3.75) 3 cJd 9h (2 players)
MP bets $2.50, BTN calls $2.50

Turn: ($8.75) 4d (2 players)
Hero ???

Villain needs to defend around 74 combos (123 combos estimated in a standard btn vs MP calling range. Also, just assumed defending 60%). Villains calling range on the flop is probably something like:

Sets (9), TT(3), AQ(16), AJ(12), ATs(2), KQs(3), KJs(2), KTs(2), QJs(3), QTs(2), JTs(2), T9s(3), 98s(3), 87s(3), 76s(3), AK(6) = 74 combos. Just saying 6 combos of AK (half) because some villains 3b pre, some flat. Its sort of a dry flop, so don't think villain really needs a flop raising range. Pretty hard to get outdrawn with sets/top pairs/two pairs. Don't think this needs to be perfect. Just an estimation. (Also, maybe J9s is in there too)

Desired Turn Combos Defended: 44
Turn defending range (45 combos):
Turn folding range (29 combos): AQ(15), ATs(1), KQs(2), KTs(1), 87(2), 76(2), AK(6)

So, whats the play for Hero??? All I know about villain is that he seems like a very competent/knowledgable player. He seems pretty balanced and controlled in his game. I'm playing two tables and he's at both of them.