KK oop check/raise this turn?

[tommo]

player seems pretty solid. Everybody at the table is calling me down no matter what I do over the past 50 hands or so...so I've tightened up a lot. not sure if this guy realizes that or not

Party Poker No-Limit Hold'em, $ Hero (6 max, 6 handed) FTR converter on zerodivide.cx

Button ($355)
SB ($330.10)
Hero ($989)
UTG ($414.60)
MP ($418.40)
CO ($155.84)

Preflop: Hero is BB with K[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/heart.gif[/img]. SB posts a blind of $2.
<font color="#666666">1 fold</font>, <font color="#CC3333">MP raises to $15</font>, <font color="#666666">3 folds</font>, <font color="#CC3333">Hero raises to $61</font>, MP calls $50.

Flop: ($132) 5[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $100</font>, MP calls $100.

Turn: ($332) J[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP bets $150</font>, <font color="#CC3333">Hero raises to $300</font>, MP calls $103.40 (All-In).

River: ($885.40) 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players, 1 all-in)</font>

Final Pot: $885.40