Which is better - Aquahot, Proheat or Wesbasto's Water Heating Systems??

[lovemynewell]

I just found out from a service center in Texas that my Aqua-hot water heater is toast or not worth repairing. So that being said, a complete new unit is in order. I've been quoted $10,695.00 installed for a new replacement. Another shop I spoke with suggested going with the Wesbasto's unit for better savings and performance. While doing a small amount of research I find out there is a third option by ProHeat. I'm really kind of leaning away from the Aquahot system, it has not been ultra friendly to us since we have owned our Newell. Prefer some unbiased opinions here if possible.