Canisters are good filters in my opinion but they do need to be regularly cleaned and that depends on the stocking level, food fed, etc. They are a bit more complicated for some people to assemble, prime and maintain because there are usually more parts than a power filter (HOB).
Also, if you plan on putting another tank below the 75G tank, the canister filter will need to be set on the floor next to the stand.
I think you would be better served using an Aquaclear (Fluval) 110 power filter (HOB) and could always add a 2nd AC 110 or a smaller canister in the future if needed or your stocking plan changes.
Also, the 75G trim may be too wide to fit a smaller AC model filter and will probably be the same for smaller Tetra or Top Fin HOB's.
