ShelbyJK500;100172 said:
On the other hand, if I end up with a basement sump it'll be for a MUCH bigger tank.
For inside the display you can use a custom sump, or even a custom divided sump to maximize the area under the tank. As you add more toys (ie. carbon, gfo, calk, etc) you will need to give up more sump space. Here is a link to a custom sump that has a notch built into it, so it will fit the stand.