FT: 5.50 5 table tourney, overpair to the board--good call?

[allhappythoughts]

Full Tilt Poker
No Limit Holdem Tournament
Blinds: t40/t80
8 players
Converter

Stack sizes:
UTG: t399
Hero: t3885
MP1: t3116
MP2: t3010
CO: t2070
Button: t1030
SB: t2350
BB: t2780

Pre-flop: (8 players) Hero is UTG+1 with 9[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/club.gif[/img]
UTG folds, <font color="#red">Hero raises to t240</font>, MP1 folds, MP2 calls t240 <font color="aaaaaa">(pot was t360)</font>, 2 folds, SB calls t200 <font color="aaaaaa">(pot was t600)</font>, BB folds.

Flop: 2[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/club.gif[/img] (t800, 3 players)
SB checks, <font color="#red">Hero bets t550</font>, MP2 folds, <font color="#red">SB raises all-in t2110</font>, Hero calls t1560 <font color="aaaaaa">(pot was t3460)</font>.

Turn: J[img]/images/graemlins/club.gif[/img] (t5020, 1 player + 1 all-in - Main pot: t5020)


River: 4[img]/images/graemlins/club.gif[/img] (t5020, 1 player + 1 all-in - Main pot: t5020)


Results:
Final pot: t5020


So it's pretty early on. I've been playing tight, I've only shown down one hand--AA, from which I won almost all my chips. Villain, on the other hand, has made some pretty ridiculous moves, including shoving all-in almost 2 hands before with two overs after hitting air on the flop (no draws, either). He ended up sucking out on an overpair by rivering the ace.

My reads on villain are as follows: he would have reraised probably with JJ+, AK, AQ. He could be playing any ace or a smaller pocket pair, or maybe he has the gutshot. I will say with high certainty that he didn't hit a set, because I don't think he would have reraised all in. He's probably on the gutshot, or maybe he just wants to push me out of the hand. All in all, I'm almost certain I'm ahead. Given the reads, instacall, right? Perhaps a better question is: do I want to risk such a large portion of my stack on this hand? I usually play 1 table SNGs, so I'm not as well-versed with MTT strategy. If this is just a retarded question, please let me know, I just don't play that many MTTs.

Also: pf raise is fine, right? I know some people will say I should limp with this...I like to mix it up and limp and raise like 50/50 from this position. If I had been reraised, I would have been willing to let it go, depending on how many more people entered the pot.

Thanks for the input guys.