Looks good...had a semi-similar hand the other day at $50 NL where nit raises 5x bb UTG and checks the K hi rainbow flop then donk bets the turn blank when I hit a set of 5s. I just call. Weakest play ever by me but river went check-check and he flips 3 kings and scoops a tiny pot.
This big raise check flop, check-raise turn is a good spot to ditch, as you say, by instinct.