I had a two-year love affair with Neopan 400 after buying some "Presto" in Japan -- it weaned me off Delta. In the end I decided that what I really liked was Tri-X, and Neopan was just a transitional stage back to the film of my childhood
I like Neopan in X-tol and Rodinal.
Acros doesn't like Rodinal so much, but it's excellent in X-tol, crisp and somehow metallic-looking (steep part of the curve I guess). It's my favored low-speed B&W film, though I wish I could get it in bulk.
I prefer acros over tmax100. In my soup of choice (Dixactol ULtra - pyro type dev) it is very sharp indeed and remains effectively grainless (5x4 sheet film). Gives fair speed in Dixactol - I rated it at 64 in constrasty spanish sun with reduced development, but would rate it at 80 on average. In contrast to what I have heaqrd about it being delicate in pyro, I have had only perfectly clean negs so far (5x4 dev'd in combitank)