Hey Tracy,
I didn't read all the posts, but I just wanted you to know that one of the local reefers here in Phoenix I know has 4 of those magnets, and swears by them. He has them on 2 M820's and 2 M1100's I believe. They look really clean if you can keep the outside magnet away from view. Like if you mount on the back wall of the tank. If you have the magnet on a side of the tank that is visible they are not very attractive. Just food for thought.