Hand Review: Hand 1, Turn Check Raise

[macdaddy991]

- - - HAND 1 - - -

Party Poker 3/6 Hold'em (6 max, 6 handed) converter

Preflop: Hero is BB with A,[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/spade.gif[/img].
UTG calls, 1 fold, CO calls, 1 fold, SB completes, MICROPOSTER checks.

Flop: (4 SB) J[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/heart.gif[/img] (4 players)
SB checks, MICROPOSTER bets, UTG calls, CO raises, SB folds, MICROPOSTER calls, UTG folds.

Turn: (4.50 BB) 9[img]/images/graemlins/diamond.gif[/img] (2 players)
MICROPOSTER checks, CO bets, <font color="red">MICROPOSTER raises </font> , CO calls $0.50 (All-In).

I don't think I necessarily like this check raise. I understand that the CO may be stacking off, but hero has a weak kicker and the CO has already shown agression. Maybe it is moot, but the CO will be within .50 of being all in anyway on the river if the hero just check/called down. Maybe this hand would have been better with some sort of read, but if the CO had had more money, then he could have 3 bet the turn. This puts the hero in a somewhat delicate spot of having TPSK. What are your thoughts on the hero's turn line?