I should have said--personally I tend toward Tri-X and Efke PL100. The speed issue is a valid concern. If you're fighting the wind on the Pali or you're concerned about waving branches or grass, film speed will overtake grain as a concern with 4x5", particularly if you are also using filters common with B&W and/or shooting during the "golden hour." On the other hand, if your shutters don't have a high top speed (a common situation with 8x10") and you are shooting mid-day, then the faster film can be a problem.

Ektapan--beautiful, especially for a classic portrait look, but alas it's been out of production for a while now. You can still find some around if you look.