Any film will need tweaking to make it work for you. I suggest you stick with the film. Neopan 400 is my favorite film by far. I develop it in Xtol 1:1 and get beautiful tonality. But that's what I like and that is what works for me. If you find your shadows are too dark, back your EI off to EI250 or so. If you're worried about your highlights being to hot, then decrease your development time by 10-15%. I used to do all the boring testing and get serous about it. But in the end I found out that the only way I learned is to shoot lots of film, take lots of notes, and experiment. You'll find your magic bullet. Good luck!