Alright, so I'll try to set everything up as best as I can.
Effective Stacks about 600.
The previous hand I had gotten in all in w/ AK against another AK and chopped, this was after making a big three bet in the BB against a raise and four callers earlier in the hand.
I get dealt AcKc in the small blind. UTG raises to $20 and gets four callers. I decide to flat, because I felt that three betting again in almost exactly the same scenario as last time would have brought an overshove from the field and I didn't want that.
Flop comes AhJc6d
I check, with the intention of check raising. It checks through
Turns comes the 8c
I bet out $50. UTG (The initial raiser) raises it to $150. He is a decent, knowledgeable player who is capable of making a bluff raise if he thinks he can get away with it. two folds, then MP, who I don't have a solid read on, raises all in for $425. Everyone else folds.
I've got TPTK with the NFD. What do I do?