I have the Nikor 50mm 1.4, and the Nikor 35mm 1.5.
I whish I would have done the 1.8 for the 50mm. the extra stop doesnt buy that much, and at 1.4 the sharpness is not there.
I am shooting a D7000, with sigma 10-20mm, nikor 50mm 1.4 and 35mm 1.8, finally nikor 55-300
with those 4 lenses, i can pretty much cover any situation.
this was with the 50mm 1.4