[TRWIII]

In this case I'm not sure the button would bluff the river anyways sice it brought a possible completed flush and straight, but I think I would have tried for the bluff call myself. Your read seems sound (I'd guess an AKo myself but not sure) since its unlikely he has you beat or he would have likely reraised the turn. The only thing I'd worry about is a bad jack (a suited JT or some such) but that;s unlikely.

Overall well played, though I'd leaned towards trying to induce a bluff.

Thats my two cents,
TRWIII