Tough spot I think. I would probably raise to 125 preflop especially being UTG so I didn't feel quite as committed to trying to take it down post (or could get away from it more easily if I get reraised preflop). I do think I'd fire a CB of about 200 out there though. Unfortunately if that fails to take it down it's just an ugly situation, and would really be annoying to have to check/fold after that given the amount you've invested and the amount you'd be leaving yourself with, but I'm not sure I see a better alternative.