the bottom of my tank is at 42" . Nice viewing height for in wall. I dont know about the reef devil being enuf on a 210...right at the limit. As long as it is not overstocked and you are running a mag 7 on it it should be ok.
If and when I move, If I sell my 180 that will be it for the big tanks, I still got a 29 gal in my bedroom.