Ill go ahead and third that. I am also using the Nikon FM and I've had awesome success with Kodak BW400CN. Since it is a chromogenic color print film it is developed using the C41 process whereas many local places cant develop Tri-X since it is a dedicated panchromatic film.
Originally Posted by sangetsu
If youre set on using pan film, I may also be bold enough to suggest Kodak 125PX. Its a slower film than the 400 speed of the BW400CN and (if you want) Tri-X but it looks really nice in my opinion.
As far as the Nikon FM, the meter is really great, the ergonomics are fantastic, its an all around great camera. What color is yours?