According to your stats, he looks as if he has a pretty wide pfr range. With that said, I'd go for the flop check/raise and re-evaluate a 3-bet on the turn.

If he likes to raise a lot when you play back at him he's probably a bully, then I'd be calling down. If I improve, I'd bet out and 3-bet the turn. But generally, calling down non-A turn and river seems okay to me.

Since I'm new to 6-max, I'm unsure if generally calling down when an overcard like an A shows up on later streets is okay to do HU/3-way.