I was thinking about a 6 foot tank with similar dimensions to yours, I like not having to do such big water changes, but a 6 foot tank looks appealing to me, I also think height is not very useful, which is why I would never get a standard 90, The standard 75 that I have was the best compromise, but I might get a shallow tank like yours in the future, I just want to keep the total water volume less than 90, so it is easier to manage.
Tank, stand, all livestock, corals, and rocks are sold! I would have posted it on here but I guess you have to be a member to post a for sale thread? Still have some equipment left though. Sad to see it go but Im free of responsibility for now. Maybe a new tank will be in my future. We will see.