It's been a great shootout so far. After 11 hands 3 players had to leave the ring. It's calmed down a bit, and we're on the bubble. Is this a good spot to push?

Pacific Poker No Limit Hold'em Tourney (buyin: $5 + $0.5)
Big Blind is t100 (4 handed)

BB (t1920)
Hero (t840)
Button (t3120)
SB (t2120)

Preflop: Hero is UTG with 7[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/heart.gif[/img].
SB posts a blind of t50
<font color="#CC3333">Hero raises to t840 [all-in]</font>