If you were willing to call all-in, why wouldn't you bet the ace? 79 VPIP means he will play A-rag any day. If he calls a 2/3 PSB on the A, he probably has one (he's a calling station, so he isn't worried about his kicker). If he raises or bets the river, at least you didnt call away your stack. As it stands you have no idea if he has an ace or not. Edit: As you said, he overbets his monsters, so I think the river is a fold. Ax[img]/images/graemlins/heart.gif[/img] could also account for a medium turn bet.