Top pair + OESD, deep stacked from 11r. Plan of action here?

[redrooski24]

PokerStars No-Limit Hold'em Tourney, Big Blind is t400 (9 handed) converter

Button (t16773)
SB (t12175)
Hero (t14460)
UTG (t23592)
UTG+1 (t16700)
MP1 (t25546)
MP2 (t7294)
MP3 (t6210)
CO (t12420)

Preflop: Hero is BB with 5[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/heart.gif[/img].
UTG calls t400, <font color="#666666">1 fold</font>, MP1 calls t400, <font color="#666666">3 folds</font>, Button calls t400, SB completes, Hero checks.

Flop: (t2000) 3[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, <font color="#CC3333">Hero bets t1200</font>, UTG calls t1200, MP1 folds, <font color="#CC3333">Button raises to t4000</font>, SB folds, Hero ....