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)

Tom