Common Top Pair Situation

This type of hand seems standard with reads, but this hand is against an unknown. I don't like to go into check/call mode when the turn looks unfavorable, but on the other hand I didn't want to just let this guy have it. My river play was a no brainer, but I'm really wondering about my play on the turn.

Party Poker 2/4 Hold'em (9 handed) FTR converter on zerodivide.cx

Preflop: Hero is MP1 with K[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/heart.gif[/img].
2 folds, Hero raises, MP2 calls, 3 folds, SB calls, BB calls.

Flop: (8 SB) 6[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/heart.gif[/img] (4 players)
SB checks, BB checks, Hero bets, MP2 calls, SB calls, BB folds.

Turn: (5.50 BB) A[img]/images/graemlins/diamond.gif[/img] (3 players)</font>
SB checks, Hero checks, MP2 bets, SB folds, Hero calls.

River: (7.50 BB) K[img]/images/graemlins/heart.gif[/img] (2 players)
Hero bets, MP2 calls.

Final Pot: 9.50 BB