I love the combination of HP5 with pyro for its "watercolor grain" effect combined with superb edge acutance when shooting it in 8x10 film and enlarging it no more that 3X; but at higher magnifications it looks mushy to me, so I never shoot it in 120. On those very rare occasions when I want buckshot grain in an image, and a certain level of drama in contrast, I'll shoot Tri-X in roll film version. Neither is a true 400 speed film. But TMY400 is the real deal. Superb linearity and shadow separation even in bright sunlight. True 400 speed, at least for me. Exceptionally fine grain for a film that speed, yet good edge acutance too. You have to meter it a bit more carefully than other films, but so what. But for a different look, I'd add to the mix Delta 3200, which I rate at 800 anyway, just a stop above 400. I simply don't get the idea of rating FP4 high. For all practical purposes, I find it to be an ASA 50 film, so shooting it at 400 simply equates to lopping 4 zones from the shadows. Kinda like chopping down a Christmas tree and coming home with the stump instead. Rate it higher than even that, and all you get is some leftover sawdust.