We got a Stiebel Eltron Tempra 24 from Plumberscrib.com (the cheapest we could find online). We LOVE it!!!! The only downside to the tankless water heaters is that they pull a lot of amperage, so you definitely need to plan for them. They are hard to install after you have everything built due to the amperage- that's why you don't see folks add them to their houses after the house is already built. We had a 200 amp panel built into our barn to handle the water heater, ceiling fans in 4 stalls, and lights.