I shot Tri-x for years on 4x5, and I found it really easy to work with. Keep in mind its rating is ISO 320 in the Professional emulsion (4x5), and 400 in the 35mm version. T-Max is 400. But then I always rated them at about half their actual speed - this because of an older lens with a certain amount of flare, plus I just like a well exposed neg. With a newer multi-coated lens, you could rate it higher, and of course it depends on your developer, agitation, and enlarger lighting source. I just found T-max to be a bit touchy. It's probably my laziness or lack of thorough testing, but I always could rely on Tri-X to have a fair amount of flexibility. And for some reason, I thought the "feel" or "atmosphere" of Tri-X was more realistic. Pretty darn subjective, but there it is.