So we ended up getting a 75 during our local reef fest, and are now in the process of putting it together, and eventually moving the fish/corals from the 40 gallon to it, but it will be a slow process. Still need to get lights, and build the sump, although picked up two new 40 gallon tanks and one is going to be made into the sump. We have a 125 predator, 40 coral/fish, and 14 bio cube tank already... but going to a 75 is going to be a bit different as we have not done anything this big for corals.