VERY NICE!!! ..... HOW MUCH!?!? 400+ bb deep

[tcorbin16]

villian is 43/13 and like waaaaaaay [censored] deep. he will pot out a lot of A high flops oop. he pretty much bets to when checked to post flop. now i gotz the 2nd nuts here with a pretty LAG image.

i have been gettin the best of him so far.

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

SB: $320.00
BB: $3,909.85
UTG: $1,060.00
CO: $1,684.00
Hero (BTN): $4,383.00

Preflop: Hero is dealt K[img]/images/graemlins/spade.gif[/img] 9[img]/images/graemlins/spade.gif[/img] (5 Players)
2 folds, <font color="red">Hero raises to $30.00</font>, SB folds, BB calls $20.00

Flop: ($65) 4[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/heart.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $45.00</font>, BB calls $45.00

Turn: ($155) K[img]/images/graemlins/diamond.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $95.00</font>, BB calls $95.00

River: ($345) 5[img]/images/graemlins/spade.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $265.00</font>, <font color="red">BB raises to $1,040.00</font>, <font color="red">Hero ...? </font>

he has about 2.5-3k behind after he raises. do i shove? or do i call? or do i make a raise...? if so how much???