Does anyone know of a reliable heat pump water heater?

These things sound like a dream come true- use the ambient heat to make hot water. Payback is as little as 2-3 years. Our basement would be ideal, with temps ranging from 60-80 degrees year-round. The problem is that the reviews are dismal. I almost bought one at Home Depot that was marked down to half price, but when I researched them, it sounds like the failure rate is very high. I'm building a new house, and need to make the WH purchase within a couple months. Perhaps I should just install a cheap conventional unit until the quality comes up?