I've already ordered my Animal plastics - they can route in belly heat so all you have to do is assemble the cage (saves you shipping costs and takes like ten minutes) and hook up a thermostat. Plus you can customize all of the options and the AP cages are thicker than Vision so they retain a bit better. I'm going with AP and their customer service is Fantastic as well. The 36" is what I got because it is quite deep so there is lots of floor space. Item #T3 I believe it is.