Pablito said:
The lens is not everything................. I preer the Schneider enlarging lenses. Good luck!
If the choice is between a good lens such as a Nikkor and a very good lens, better than the Nikkor, then and only then "the lens is not everything".
But if you happen to purchase a lens below the Nikkor quality, such as the "Schneider Kreusznach Componar S 4.5/80" (Schneider manufactures lenses of different types, some are among the worst and some are among the best - so if it is a Schneider, new from the store, price may tell) - then you will waist years and years of mis-educating your eye at the darkroom, with all the expense attached. Specially consider paper expense.
Sorry, no compromise here. Within the above clarified parameters, a decvent lens is the first issue to consider. When enlarging you are E N L A R G I N G the image. If your lens is unsharp and lacks minimum contrast, then you will be multiplicating unsharpness and softness.
Pedro, I dont know your budget, nor the surrounding possibilities you will have to use it. Given that you are not poor, and a decent lens is granted within your budget, then you can deal with a decent enlarger too, and the Saunders color one, with its fine focusing arm, is a pleasure I enjoy.
On the other hand, if you happen to be streched budget like I was when I started, these days and for several years already, people are selling darkroom used gear at very low prices, and on some occasions giving it for free. If you are within a stretched budget, the lens is the issue.
Cheers,
Ruben