$100 NLTRN - valuebetting with two pairs on scary river

[Kharlog]

This is a first hand of a tournament. The opponent is slightly winning player at $100s+. I have never before played him so no reads. Opponent checks quickly on river. Would you value bet this? If you would how much would you bet? Would you fold if the opponent happens to check/raise?

Poker Stars
No Limit Holdem Tournament
Blinds: t10/t20
2 players
Converter

Stack sizes:
Hero: t1500
BB: t1500

Pre-flop: (2 players) Hero is SB with 9[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/diamond.gif[/img]
<font color="#cc0000">Hero raises to t60</font>, BB calls t40 <font color="aaaaaa">(pot was t80)</font>.

Flop: 7[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/spade.gif[/img] 9[img]/images/graemlins/heart.gif[/img] (t120, 2 players)
BB checks, <font color="#cc0000">Hero bets t90</font>, BB calls t90 <font color="aaaaaa">(pot was t210)</font>.

Turn: K[img]/images/graemlins/heart.gif[/img] (t300, 2 players)
BB checks, <font color="#cc0000">Hero bets t200</font>, BB calls t200 <font color="aaaaaa">(pot was t500)</font>.

River: A[img]/images/graemlins/spade.gif[/img] (t700, 2 players)
BB checks, Hero ...