PS $4.40 180 - River value bet - should I just shove here?

[2Fast]

Just wondering what people think - wanted to extract something out of both guys but I'm betting half my remaining stack into the pot on the river as a ~ 1/3 value bet - give that they've played along with me til here would a shove have been better? I always tend to just bet for value with the nuts here but maybe they both look me up with two pair?

PokerStars No-Limit Hold'em Tourney, Big Blind is t30 (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

CO (t1070)
Button (t1515)
SB (t1860)
Hero (t3100)
UTG (t2470)
UTG+1 (t950)
MP1 (t3940)
MP2 (t1575)
MP3 (t2160)

Preflop: Hero is BB with T[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/club.gif[/img].
UTG calls t30, UTG+1 calls t30, MP1 calls t30, <font color="#666666">1 fold</font>, <font color="#CC3333">MP3 raises to t60</font>, CO calls t60, <font color="#666666">2 folds</font>, Hero calls t30, UTG calls t30, UTG+1 calls t30, MP1 calls t30.

Flop: (t375) Q[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/spade.gif[/img], 3[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(6 players)</font>
Hero checks, <font color="#CC3333">UTG bets t120</font>, UTG+1 folds, MP1 calls t120, MP3 calls t120, CO calls t120, Hero calls t120.

Turn: (t975) A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(5 players)</font>
<font color="#CC3333">Hero bets t420</font>, UTG folds, MP1 calls t420, MP3 calls t420, CO folds.

River: (t2235) 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets t840</font>, MP1 calls t840, MP3 calls t840.

Final Pot: t4755