I use and love the Animap Plastics T8. The T8 is 48"x24"x12". I use a divider to house 2 Ball Pythons that are less than a year old, then remove the divider and let 1 Ball have the whole thing once they are big enough.
These are 2 of my AP cages. the one on the top is a T8 and the one on the bottom is a T12. I have the T12 for my Carpet Python
I can post more pictures or answer any questions that you have if you are interested.