2/5, 200bb stacks, flopped set. best line to get AI?

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2/5 NL at the Bellagio. I am in the BB, villain is UTG. I have just shy of $1k, villain has me covered (barely). Villain is fairly new to the table (<1 hr), has played very few hands. Bought in for $500, doubled through someone else with AA. I can't say for sure what Villain's image of me was, because I changed gears a few times around this part of the session as the table makeup changed.

Villain (UTG) makes it 20 to go.
I have 33. MP calls. I call.

Flop is J[img]/images/graemlins/spade.gif[/img]7[img]/images/graemlins/diamond.gif[/img]3[img]/images/graemlins/spade.gif[/img]

MP checks.

What's your line here?

I opted to lead for $50.

Villain made it $120 more.

What now?