Tricky spot, yesterday's 500K

[SoBeDude]

PokerStars No-Limit Hold'em Tourney, Big Blind is t200 (9 handed) converter

MP2 (t4345)
MP3 (t4130)
CO (t9000)
Button (t7835)
SB (t2875)
BB (t4920)
UTG (t3455)
UTG+1 (t3765)
Hero (t6325)

Preflop: Hero is MP1 with J[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to t700</font>, <font color="#CC3333">MP2 raises to t1200</font>, <font color="#666666">5 folds</font>, Hero calls t500.

Flop: (t2700) 7[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP2 bets t200</font>, Hero calls t200.

Turn: (t3100) A[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP2 bets t2945 (All-In)</font>

What's your play and why?

-Scott