AA on KQ8 flop

PS $45k guaranteed tourney, 3rd level. BBs are 100t. Above average stack (can't remember exact avg.) New to the table, no reads on Villain.

PokerStars No-Limit Hold'em Tourney, Big Blind is t100 (8 handed) FTR converter on zerodivide.cx

UTG (t16720)
UTG+1 (t2445)
MP1 (t2010)
MP2 (t6300)
CO (t7780)
Hero (t9340)
SB (t3995)
BB (t7805)

Preflop: Hero is Button with A[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 calls t100, <font color="#666666">3 folds</font>, <font color="#CC3333">Hero raises to t300</font>, <font color="#666666">1 fold</font>, BB calls t200, UTG+1 calls t200.

Flop: (t1250) 8[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, UTG+1 checks, <font color="#CC3333">Hero bets t700</font>, <font color="#CC3333">BB raises to t1400</font>, UTG+1 folds, <font color="#CC3333">Hero ???

Also, if you say re-raise, what is your plan if he pushes all-in?

Comments on earlier betting also appreciated.