20/180 early AJ resteal

[AllinDan]

Villain in hand had raised the previous two hands, showing 65o and A5o. He seemed pretty bad. I don't have a lot of experience with reraising from the small blind, and then his rereraise just confused me.
What should my plan be for this hand? based on the previous hands I considered check/pushing the flop, but that's kind of a stab in the dark. His check behind was surprising too.

Thoughts?

PokerStars No-Limit Hold'em Tourney, Big Blind is t50 (8 handed) internettexasholdem.com

saw flop|<font color="#C00000">saw showdown</font>

UTG+1 (t2000)
MP1 (t1555)
MP2 (t1985)
CO (t2780)
Button (t1540)
Hero (t1665)
BB (t1225)
UTG (t750)

Preflop: Hero is SB with J[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/club.gif[/img].
<font color="#666666">5 folds</font>, <font color="#CC3333">Button raises to t100</font>, <font color="#CC3333">Hero raises to t300</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">Button raises to t500</font>, Hero calls t200.

Flop: (t1050) T[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, Button checks.

Turn: (t1050) 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero ??? . . . . .Checks, Villain bets 200