Alright! Well, the two Exo terra cages I linked to, with their floor space if it was only 12" high it would be 33.7 gallons so I wasn't sure because everyone says 30-40 gallons for the proper size, so I figured 33 gallon plus all that height would be a good choice? I guess I'll keep looking for cages, thanks! I did quite like the idea of the front/side door thing rather than reaching in from above as I know that affected my female corn's behavior majorly.
Editing to add: Either that or the calculator I've been using to figure out the gallon size I've been using is wrong