TPFK vs all-in check-raise

I've been thinking about this hand from earlier today. How should I have played it differently?

62 players remain out of 700. Blinds are 600/1200, antes 75. Hero has 20300 in chips (M is 8, orange zone). UTG+1 is in the top 10 with 35670 and just arrived at the table. #1 and #3 chip leaders are also at the table (BB with 47975, Button with 41270).

Paradise Poker (8 handed) converter

Preflop: Hero is MP1 with K[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/diamond.gif[/img]. <font color="#666666">1 fold</font>, UTG+1 calls, Hero calls, <font color="#666666">2 folds</font>, Button calls, SB completes, BB checks.

Flop: 8[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(5 players)</font>
SB folds, BB checks, UTG+1 checks, <font color="#CC3333">Hero bets 3600</font>, Button folds, BB folds, <font color="#CC3333">UTG+1 raises all-in 34393</font>, Hero calls all in 15427.

Turn: 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>

River: Q[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>

Final Pot:

Results in white below: <font color="#FFFFFF">
UTG+1 has Ah Ac (one pair, aces).
Hero has Kd Jd (one pair, kings).
Outcome: UTG+1 wins . </font>

Would you have called his check-raise? If I had more chips I would've probably folded, but folding would've left me with only 15000 (M of 6, soon to be 4 with the blinds about to go). I probably should've raised preflop to better define where I stood, but if UTG+1 just called I'd be in the same situation. If he raised preflop I would've had a tough decision.

Side note, UTG+1 from this hand was one card away from winning the whole tournament, and ended up finishing second.

-david