I have a 75mm El-Nikkor (non-Apo) which is highly satisfactory, but I think that Rodagons or Componons of the same focal length (or 80mm) would be essentially identical in overall quality. Right now, high quality enlarger lenses go for very low prices on E-Bay. Would you believe a 150mm Rodagon, in excellent condition, for $50?! The seller told me I got a good deal; actually it was more of a steal!