IMHO - I would go with HP5+ or Tri-X not TMY400. I might also consider a developer other than the two you are thinking of using. Such as HC- 110. But as with all things related to this -testing is the only way to go. But I would test out the different combinations with an eye towards the final size of prints you intend to be making in the future. Often a film /developer combo that works well (fine grain,etc.) at 8X10 print size does not hold up well at 16/20 or 20/24. This is not an uncommon result of "pushing "film in "fine grain" developers.(posted 8947 days ago)