Top Pair - Good Kicker - Is calling down a mistake?

[22pajo]

Limit: $0.50/$1
10 players

Villain is TAG (29/10/2.5 over 70 hands).

Pre-flop: (10 players) Hero is MP3 with Q[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/heart.gif[/img]
4 folds, MP2 calls, <font color="#cc0000">Hero raises</font>, <font color="#cc0000">CO 3-bets</font>, 4 folds, Hero calls.

Flop: K[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/club.gif[/img] (8.5SB, 2 players)
Hero checks, <font color="#cc0000">CO bets</font>, Hero calls.

Turn: T[img]/images/graemlins/diamond.gif[/img] (5.25BB, 2 players)
Hero checks, <font color="#cc0000">CO bets</font>, Hero calls.

River: J[img]/images/graemlins/heart.gif[/img] (7.25BB, 2 players)
Hero checks, <font color="#cc0000">CO bets</font>, Hero ???

Any other way to play this?