No really sure, i like the idea of a lower thermostat, but from what i heard the single cooler just wont do. need the surface area to cool, hence the dual cooler setup.
i actually took my thermostat spring and plunger out yesterday and running maybe 10 degrees cooler here in florida, still worms up the same time. so no need for a different thermostat if you can just take the spring and plunger out.
just an opinion, but if you have the money and the chance get the dual setup.