Jennifer,
I would recommend J&C 400 in place of Tri-X unless you have a lot of money to burn. I've shot a lot of Tri-X but its just too durned expensive in LF sizes. J&C is about 1/3 the price, seems to work great in just about any developer, including all the incarcerations of pyro. Lots of reputable (and some of us not so reputable) LF nogs are using it.