My HUD wasn't up yet, but i recognized the villain and had played with him before at 400NL. No other reads.

At 200NL i'd just let this one go, is this any different?

PokerStars No-Limit Hold'em, $4 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Hero ($497.10)
MP ($188.80)
Button ($216.85)
SB ($396)
BB ($400)

Preflop: Hero is UTG with A, K.
Hero raises to $16, 3 folds, BB calls $12.

Flop: ($34) 6, A, 3 (2 players)
BB checks, Hero bets $28, BB calls $28.

Turn: ($90) 9 (2 players)
BB checks, Hero bets $72, BB raises to $184, [color=#CC3333]Hero ????