River play

I'm trying to make the move from limit to no limit. One of the toughest adjustment is the fear of a check-raise (and a check-raise bluff).

I was playing a 5$ sng at PokerStars when this hand accured

In this situation, would you bet or check the river.

PokerStars No-Limit Hold'em Tourney, Big Blind is t20 (9 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

UTG (t2020)
UTG+1 (t1280)
MP1 (t1280)
MP2 (t1300)
MP3 (t920)
CO (t1870)
Hero (t1450)
SB (t1710)
BB (t1670)

Preflop: Hero is Button with A/images/graemlins/club.gif, T/images/graemlins/spade.gif.
<font color="#666666">1 fold</font>, UTG+1 calls t20, <font color="#666666">2 folds</font>, MP3 calls t20, <font color="#666666">1 fold</font>, Hero calls t20, <font color="#CC3333">SB raises to t40</font>, <font color="#666666">1 fold</font>, UTG+1 calls t20, MP3 calls t20, Hero calls t20.

Flop: (t180) K/images/graemlins/club.gif, 4/images/graemlins/club.gif, A/images/graemlins/spade.gif <font color="#0000FF">(4 players)</font>
SB checks, UTG+1 checks, MP3 checks, <font color="#CC3333">Hero bets t160</font>, SB folds, UTG+1 calls t160, MP3 folds.

Turn: (t500) 8/images/graemlins/diamond.gif <font color="#0000FF">(2 players)</font>
UTG+1 checks, <font color="#CC3333">Hero bets t260</font>, UTG+1 calls t260.

River: (t1020) 5/images/graemlins/club.gif <font color="#0000FF">(2 players)</font>
UTG+1 checks, Hero checks.

Final Pot: t1020