[darkcore]

not playing that high, so take everything i say with a grain of salt... but imo the only way to get much more value is (like iggy pointed out) to raise the flop.

as played he almost pot flop, 1/2 pot turn and now has to realize you have at least a 9. and there are not many hands out there that will pay you off big. and in the unlikely case you get some more big river action here, chances are you are in trouble.

i'd just value bet river a bit and let him look you up.