I think APX100 and Rodinal 1:50 is the best (in my opinion, of course). Pan F+ and FP4+ are also great in Rodinal.... so basically what I'm saying is that I love Rodinal. I'm not a big fan of the Delta films, so I don't have a lot of experience with those. And I am just starting to try pyro developers, I have only tried WD2D+ thus far, and I really like it with APX100. -Grant