Party 11 - Proper Push??

[TredWel]

Warning: I'm fairly new at SNG's. I'm a LHE ring player normally, but have just felt burned out lately, so I thought I'd start to play a few more SNG's to break the monotony of limit cash games. Looking for any advice about this push.

Reads: Hero went through a nice run of cards in the early levels, taking down several pots both preflop and postflop without showing my cards. I've been quiet for a few hands now. BB hasn't done anything crazy yet, and has accumulated his stack by catching big hands after the flop and having people pay him off. MP1 has limped in a fair amount, and has played passively.

Party Poker No-Limit Hold'em Tourney, Big Blind is t100 (7 handed) http://216.119.70.224/converter/hhconverter.pl

BB (t1930)
UTG (t745)
MP1 (t1055)
MP2 (t1125)
CO (t750)
Button (t1080)
Hero (t1315)

Preflop: Hero is SB with 9[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, MP1 calls t100, <font color="#666666">3 folds</font>, <font color="#CC3333">Hero raises to t1315</font>...