I could have sworn I threw my 2¢ in here yesterday. Oh well.
The Computar DLs are the ones you want of the different Computars. They are amazing lenses, usable wide open. Can't say that for others. As far as the 50s go, on smaller enlargements they are all pretty much the same, or should I say, all are more than adequate. Some people like aspects of one manufacturers lenses over the others, but that is just taste. I have used practically every "great" enlarging lens over the years except the APO EL Nikkor, but I doubt I am missing out. I have an Orthoplanar that I don't even use these days since I got the Focomat. My favorite of all of them is the Fujinon EX probably, or maybe the Computar DL 65mm. Or it could be the Minolta Rokkor-x which was uber sharp in a test I did. I made some 8x10s a few weeks ago with an old Elmar I had laying around. The prints looked pretty good. The grain wasn't super sharp, but the prints were nice. I doubt anyone would notice unless it was pointed out, which I guess is my point.
One thing to consider BVY is if you are making small enlargements, sometimes it is better to use a longer lens if your enlarger can handle it. When I print 35mm on the Saunders 4550 I will usually use at least a 65, but more often than not I will use a 105 Nikkor. Basically there are two reasons. One is that you are using the center of the lens, and two, you aren't as likely to smash your head into the enlarger when trying to focus after a cocktail or two. I do it because of the second.....