Without a hell of a read on the villian, I am willing to play for his whole stack. You had him covered by a ton. His quick call could have just as easily come with any naked ace. I wouldn't expect a set, because he would have raised to protect against the heart draw and straight draw on the board. I would have moved in. If he had played A-8, A-9, 9-9 , or 8-8 I would just have to give him his money and move on to the next hand. Why did you play AK in the first place? This is about the best board you could ask for.

I think the fold was a little weak.