Since the death of Bergger VCNB, I know of no enlarging paper which I consider good enough to use. (Yes, I know that Bergger is marketing a paper, but it's not the same.) This is the reason I'm not making any enlargements at present. When I find a good enough paper, I'll begin whittling down the ever burgeoning backlog I have of 6x6 cm negatives that need printing.
Why not contact print the 6x6 cm negatives? I've seen some jewel-like medium format Azo contact prints by Peter Schrager. I understand Paula also has quite a number of 6x6 Azo prints.