sorry, missed both of you being deepstacked. But I think in that case you have to make an even bigger 3 bet if you want to vary and not a smaller(you're now giving him odds to call with any pp). I understand why you call the 4bet. At 50NL some players don't even have AK or QQ in their 4bet range, but since your both deep it might be the case here. the river betsize is fine (any lower and a reraise will have you wondering if it's a bluff). His range imo is really narrowed to JJ/AK and maybe TT