10/25 Live flopped straight

[IRIVERU]

8 handed 10/25 game with stack sizes ranging from 3-20. I straddle to 50. 4200 behind me
folds to MP who covers me(tight-passive player who can overvalue non nut hands in big pots, knows i play very laggish) He raises to 250 and gets a call from a loose player who also covers me and just entered the game.
I call 200 in straddle with Q [img]/images/graemlins/spade.gif[/img]10 [img]/images/graemlins/spade.gif[/img] . flop comes K 9 J rainbow. POT (785)
I check
MP makes it 400. Button calls 400. Hero makes it 2000 total.
MP calls Button calls!!! POT(6785)
Turn J.
i have around 1900 left.
I...