KK in 3 bet pot against solid tag - NL$50 6m

[AZplaya]

Villian in this hand is baba-joon, one of the more solid tags at NL$50 on FTP imo. Have him at 20/16, he's very aggro, good hand reader, etc. He should have me at 23/17ish, not sure of his other reads on me.

Full Tilt Poker, $0.25/$0.50 NL Hold'em Cash Game, 6 Players
LegoPoker Hand History Converter

BB: $41.55
UTG: $61.25
Hero (MP): $56.50
CO: $66.35
BTN: $55.70
SB: $50.25

Pre-Flop: K[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/diamond.gif[/img] dealt to Hero (MP)
<font color="red">UTG raises to $1.75</font>, <font color="red">Hero raises to $6</font>, 4 folds, UTG calls $4.25

Flop: ($12.75) Q[img]/images/graemlins/club.gif[/img] 4[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/heart.gif[/img] (2 Players)
UTG checks, <font color="red">Hero bets $8.50</font>, UTG calls $8.50

Turn: ($29.75) 2[img]/images/graemlins/heart.gif[/img] (2 Players)
UTG checks, Hero???

I almost always check behind against a solid player here, but my concerns are:
1. The pot is already huge.
2. He likely puts me to a decision for my stack on any river if I check behind.

Whats your line? If you check behind, do you call a big bet on a blank river?