age is not a good factor to concider in my opinion. Only quality, while the nikkors were very good, the better schneiders and rodenstocks were fantastic. A great 30 year old enlarging lens is still great. Ansel printed since the depression (1929) and no one complains about his prints.
You make a very valid point, but the Schneiders and Rodenstocks both come in multiple lines, so the question becomes Which are the better Rodenstocks and Schneiders? I was originally hoping for an answer along the lines of lens A-1 was replaced by A-2 in 19xx, and using the information as a way of keep track of lens improvements.
But any suggestions for lens models to look out for is welcome. I can print up to 4x5, so a set of enlarging lenses for me would probably be a 50mm; 80mm; and 135mm.
Thanks for any suggestions!