I am betting a brass 3 tap tower and can get Brass plated new 525 perlicks or Brass plated used 425 perlicks for about the same price. My concerns about buying used is they do show so small scratches and with brass used faucets can lose that luster. However, I have read that the 525 has problems with heavy tap handles spinning and falling open. I could also get the 575 which for what I have read don't have the problems of the 575 but introduce user error of people that dont know how to pour (friends). What you would you guys recommend?