Thomas
So, to those Tri-X lovers out there, what is it about the film that gives it its mythical status and reputation? What is it about it that just makes you love it and never want to switch from it?
Experience:
I shot Tri-X since the late 60s. -135 Tri-X is much better than 30 or 15 years ago. Sharper, smoother with less grain.
I experimented with a box of two of Neopan 400 and Illford HP-5. Neopan is 1/2 stop faster with more contrast/sharpness, not as long scaled as Tri-X. My impression of HP5 is it is slightly softer in contrast. The grain structure is grittier; leading to the appearance of sharpness up to a point were grain affects smoothness and resolution at higher enlargement factors. Face tones seem just a tad (brighter) higher on the zone scale.
Enter a Leica camera that I was lucky enough to acquire last summer. Using it for a while it seemed to demand more texture in my prints.
I'm fortunate to own a clean collapsible f/2.0 Summicron, code 11118. No fog or damaged front element. Astonishing 5x7 inch portraits using Tri-X, EI 200, lens aperture set at f/2.8 to 4, souped in D-76 1:1, 20c, 11min, 4 inv each 60s. Enlarger was a Leitz 1c. With this combination Tri-X tonality is creamy with all the sharpness you want. As far as grain, I'm viewing a 6 x 9 inch print with no visible grain in a bald sky. From viewing distance the image appears to be shot with medium format. Film Tri-X, EI 200, D-76 1:1, lens 11118.
You mention printing to 16x20. In your case you may want more lens contrast which any of the Asp or post 1979 Mandler lenses will deliver.