NL1000 flopped flush

[$upermad4it]

Party Poker - No Limit Hold'em Cash Game - $5/$10 Blinds - 6 Players - (LegoPoker Hand History Converter)

SB: $256.00
BB: $2,280.25
Hero (UTG): $1,420.00
MP: $812.00
CO: $995.00
BTN: $1,082.88

Preflop: Hero is dealt K[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/club.gif[/img] (6 Players)
<font color="red">Hero raises to $40.00</font>, MP folds, CO calls $40.00, BTN folds, SB calls $35.00, BB folds

Flop: ($130) J[img]/images/graemlins/club.gif[/img] 3[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/club.gif[/img] (3 Players)
SB checks, <font color="red">Hero bets $90.00</font>, <font color="red">CO raises to $300.00</font>, SB folds, Hero ?

Villain is gamboool1 playing 19/15/3.2. Whats the best plan here normally - get it in now or CR turn?