What sound are you looking for and position really matters driver vs input etc. Anyway you have a nice long list to choose from at reasonable prices. My favorites are Amperex yes esp 7316 overall detail and excellent tonal balance very quiet and for a strong clean signal use a 5814 mostly RCA. these are also consensus picks good luck and roll what you don’t like. Want a mellower richer tone go for a Mullard or Brimar!