Yeah, DT, the 540 has a 100 gallon sump. I guess you could always use your new tank for the fuge, and upgrade. Don't think it will fit on the wall you had planned for the aquarium though.
They are nice tanks. I have seen them. Too bad the big one takes soo many people to move it. I moved it in to their house. What a project! Whoever buys it ....... well, your on your own. Once was enough for me.