Razour, very good posts and a great approach. Smart man, glad a bit of airflow mod did the trick.
Welcome to OCF!
I will also say that having intakes on all rad fronts, Front, Top and Bottom, especially if there's a filter there (in my case there is), will improve your liquid cooling temps since all rads are getting fresh cooled air. I know some will disagree but I also believe that it depends on the situation. It won't work well on all fronts. A big case with a big open back has an exception, otherwise in most cases its front/bottom as intakes and top/rear as exhausts. One could always test both and go with the best results in the end.
Your temps look good overall.