The best manufacturer out there is Pro Panels. For a T10 you can go with (2)40 watt RHP (1 for each side). When you tell Bob (owner) what your enclosure is he will tell you wich one you need.
I new I was going to upgrade to 2 separate enclosures instead of a divided after the snakes were 10 months to a year old so I bought the bigger RHP's so that I didnt have to buy 2 new big ones once I bought another enclosure. Then i would of been stuck with (2) 40 watt RHP and have to buy (2) new 80 watt ones for
2 T-10.. http://pro-products.com/pro-heat/
Just to make sure I'm understanding, so having one RHP on the hot side and one on the cool? Would there be a risk of having the ambient heat too hot or is that not an issue bc I'd be able to control it with thermostats?