[pokercurious]

One thing I've noticed is that there is an inflection point right around having an opponent outchipped 2:1. People tend to polarize their behavior here - they either go manic or tighten up a lot.

In my experience (disclaimer: $11 turbos, mostly), opponents tend to move away from their 1500-stack play: tighter players get frustrated and start shoving. The "blufftards" and calling stations start folding.

So especially if he's calling your preflop bet with ATC, you probably have a lot of value in cbetting the flop.

With that in mind, looking at the hand as played, I'd check the river. Mostly because of the stack sizes. The pot is 300 and he's got 850 left. With your hand and his rep, you can't bet enough to discourage an overshove that would force you to fold what has a decent chance of being the best hand.