75mm El-Nikkors are very good performers and reasonably priced as they are 4 element designs. But as used enlarging lenses sell for very little these days you can probably find plenty of 80mm 6-element El-Nikkors, Rodenstock Rodagons or Schneider Companons that are real bargains. Don't pass up el-Rokkor (Minolta), Computar or Fujinon enlarging lenses, they are often the equal of the big-3. The APO-Nikkors are the highest performing lenses with stratospheric prices to match, APO-Rodagons are less pricey but also spectacular performers.
Rodenstock and Schneider budget lenses usually have names ending in -or or -ar and have a variable reputation. Omega and Beseler private labeled Rodenstock and Schneider lenses but you need to have a magic decoder ring to figure out which are the good ones and which were the low-cost 'kit' lenses: "Omegar", "Omegaron", "Beslar" etc..
Some of the Meopta lenses were good - I think the Meogons, somebody will correct me, I'm sure.