I'm not familiar with Corn husbandry, but the T8 is recommended for Ball Pythons.
You can maintain temps pretty well with just flexwatt, but if your house does get too cold, you can purchase radiant heat panels from Animal Plastics. It just depends on your ambient temps at home.
The Herpstat 2 has two temp probes and can maintain two different enclosures at two different temps if you choose too. As I mentioned before, I'm not familiar with Corn needs, so if their temp range is similar to a Ball Python's, you can use a starter level Herpstat or other single probed thermostats to maintain both enclosures with a power strip.