3rd hand into sng.. all players unknown

Hero has button with J [img]/images/graemlins/spade.gif[/img]Q [img]/images/graemlins/club.gif[/img]

all players near even in chips (around 1k) blinds are 10/20

utg - fold
call
fold
call
fold
call
fold
HERO -calls
SB - limps
BB (villian) -raises to 120

Everyone calls
so my pot odds are very nice

flop
10 [img]/images/graemlins/spade.gif[/img]Q [img]/images/graemlins/spade.gif[/img]K [img]/images/graemlins/spade.gif[/img]

SB checks
Villian bets 400
folds to me.....(i have around 850 now.. easy push ? or lay it down.... flush draw, mid pair, open ended straight draw......

please advise