Quadruple up or go home -- did I make the right choice?

[Apoc]

$20+2 SNG at UB. Still early, 8 left and blinds at 15/30. Preflop, UTG(T750) limps, MP(T1200) limps, LP(T1150) limps, and I check in BB(T850) with 7 [img]/images/graemlins/diamond.gif[/img]7 [img]/images/graemlins/spade.gif[/img]

Flop (T135 in pot) comes 6 [img]/images/graemlins/heart.gif[/img]7 [img]/images/graemlins/heart.gif[/img]Q [img]/images/graemlins/club.gif[/img]

I check my middle set, UTG bets pot, MP calls, LP raises to 360. I call (is that right or should I just push in here). UTG now raises all-in, MP calls, LP calls, and I go ahead and push in now as well.

I figured that I was against at least one flush draw, maybe a straight draw, and probably two pair or a lower set. If that's the case, I'm ahead (50%-65% according to twodimes), but there are a lot of cards which will make me unhappy.

Should I save my chips when it comes back me all-in and called by both players, or did I make the right decision, trying to quadruple up?

Thanks,
Apoc