I think this has already been recommend but I would go with the RHP's from reptile basics. The nice thing about RHP's is they don't need to be ran with a proportional thermostat you can use an off/on style like the hydrofarm ones.
I have been looking into getting a RTB once I have my balls setup perfected. (husbandry is perfect, in the process upgrading from glass to pvc). From my understanding though they need an enclosure that can support their full size so hey can stretch completely out. Depending on your RTB you will probably need something 5-6 feet in length I'm assuming.
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