what is the quietest lift pump out their. i have a 4 inch turbo back straight pipe with 5' tip. if i went with a lil cheaper pump bc of money like the raptor 150 would i be able to hear with the truck on like I've heard some people say? i keep reading what everyone is writing about the lift pumps and its clear i need one with what i do an would like for it to hold up but don't have almost 700 dollars for the air dog. so anyones opinions matters!!