I think that you should also look at Holley's HP series of pumps(HP 125 & NP 250) they are a gerotor style,& very quiet(compared to Holley blue/red,or BG)We have used them now for a few years in fact when I spoke to Holley Aust,he said that we were the first to use one here that he knew of.I like them even though we consider their HP rating optomistic. They are reliable,although we only have used them in limited use applications.They're not expensive either!