Housing Pacmans (Tubs or Tanks?)

What is better to keep your pacmans in, or what do you prefer more? I am thinking about getting one. I have both 5gl tank and a 15qt sterilite tub that I could use.

Which do you prefer?

I think tubs work nicely because it keeps the humidity in a lot better and you won't have to worry much on the substrate drying out.

Exo Terra tanks aren't bad either, but I still would choose tubs over anything unless you wanted to create a nice habitat that people enjoy viewing.