I have a Noritz Tankless hot water heater and I am looking at installing either a Chillipepper or a metlund on demand re-circ pump. There is a significant price difference between the 2 and I am a believer of the adage you get what you pay for, however I am also cheap. With that said does anyone have any experience with either of these pumps. I have read alot of info from the internet world and the Chillipepper seems to work but is loud and may have a longevity issue. The metlund does not seem to have any bad info except the price Any info would be greatly appreciated.