Great looking cages! I have AP cages as well, but not as large as the T25. I just assembled my 4th to house my BRB. I also opted for the LEDs, sliding glass doors (with lock), and flexwatt. I keep my snake room at 75f, so I don't worry about ambient temps.
I have also seen the benfit of the sliding doors, when my boas are in food mode I like the option to open the end away from their mouth lol.