I want this to be flexible...
I would like whatever I do to be used for EFI if I decide to update it later.
Most of the available tanks out there are pretty good, quality and design wise. Most of them are also versatile in the way you describe.
The BC, Aero and Wild Horses tanks can easily be used with an external OR internal pump. Just swap a few pieces and you're there, going in either direction.
So you could order either one set up for a carburetor and then upgrade to an in-tank EFI pump later.
I can't speak for the Tom's tank, as I have not studied, or seen one up close yet.
The old NWMP (Sunset Metal Fab) tank was not generally convertible, but that may have changed.
While discussing tanks, in case you're using dual tanks, I am not aware of any side tanks available with in-tank pump setups. Might be out there, but I have not seen it. Aero and NWMP are not available with in-tank pumps.
Just FYI.
Paul