...better to have a cover on it though..check the thread by Dace about a cover for a rimless tank. They can look very nice and keep your fish safe at the same time!
I got 90 gal and a lot of SPS. I also have a potter angel over two yrs never touches Sps. Got fat head, black cap, scarlet hawk,purple fire fish, two Rods onyx clown fish. Two anthias and wrasses. Potter and black cap are my favorite fish.