Any proportional controller will work well. The brand is really not the issue. Helix units will do the job, as will the others. Once you have a proportional unit, you'll never look back. Despite what others say, proportional is THE way to go unless you are controlling a room heater or air conditioner.
I like Big Apple's Herp Power model because it is so simple, has an analog-type dial and comes with the night-drop cord (timer sold separately - you can use any inexpensive household timer.)
You can use Big Apple's and Helix's with heat lamps as well as with non-light-emitting heaters like heat tape. Make sure the Herpstat can be used with heat lamps if that is what you'll be using to heat the cage.
So I guess the answer is... doesn't really matter which one, as long as you have one.
>>I'm getting ready to purchase a proportional thermostat. I'm torn between the Herpstat and Helix. Is one better than the other? I have only received info from people selling one brand or the other. I was looking for less biased information.
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>>Thanks for any advice you may have. I don't want ot make a costly $$$ mistake.