100r: Bottom Straight

[eBo]

Villain is a known winning player.
Right after rebuy period.

PokerStars No-Limit Hold'em Tourney, Big Blind is t150 (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Hero (t15430)
SB (t10799)
BB (t15257)
UTG (t6146)
UTG+1 (t5812)
MP1 (t9872)
MP2 (t11852)
MP3 (t6270)
CO (t9236)

Preflop: Hero is Button with 7[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">6 folds, </font><font color="red">Hero raises to t400</font>, <font color="#666666">SB folds</font>, BB calls t250

Flop: (t875) 8[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="red">Hero bets t600</font>, <font color="red">BB raises to t1800</font>

Do I reraise to 5400 and then call the shove? Or flat call and push any non-scary river?