The finest 400 grain I have ever seen is from TMAX 400 in Xtol. This is for nice sharp grain but small. If you want mushy fine grain, you can use HP5 in MicrodolX but you take a hit on film speed and sharpness. TMY is amazingly good film - it has great recipricosity characteristics and more contrast than TRI-X or HP5. It pushes easily. It will not capture the big brightness range that TRI-X will but for spans of 8 stops or so it is great.