Three-flush flop, brings str8 on the turn

[Jack-in-a-box]

Hi. This is three table 10$ and we have just made the money. Villian has been quiet during final table and on the bubble. How is my line?
PokerStars No-Limit Hold'em Tourney, Big Blind is t200 (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

UTG (t9121)
MP (t11898)
Hero (t5525)
SB (t7253)
BB (t6703)

Preflop: Hero is Button with 5[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/diamond.gif[/img].
UTG calls t200, <font color="#666666">1 fold</font>, Hero calls t200, <font color="#666666">1 fold</font>, BB checks.

Flop: (t700) 3[img]/images/graemlins/spade.gif[/img], 2[img]/images/graemlins/spade.gif[/img], 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, UTG checks, <font color="#CC3333">Hero bets t400</font>, <font color="#CC3333">BB raises to t800</font>, UTG folds, Hero calls t400.

Turn: (t2300) 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets t1000</font>, <font color="#CC3333">Hero raises to t4500</font>

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[illini43]

Standard.

If I don't hit the straight or improve to trips or two pair on the turn, I fold to a bet (unless its REALLY small)