I don't like the 50.00 preflop raise; Seems to small 70.00 would be a pot raise.

Flop. Calling is good.

Turn. Checking or betting is ok. As you said stacks are deep and you probably don't want too much action since the board is paired.

River. I would raise with the plan of folding to a reraise. It depends on your image and villains tendencies as to how much. I like at least a min raise on the end.