Huss
Member
The OP specified 35/2 or 50/1.4, which he already has.
Why is everyone recommending zooms and expensive stuff ?
What's wrong with expensive stuff? The camera is just a light tight box. If you can afford it, the money goes to the lenses. Currently Zeiss makes the best manual focus lenses for Nikon.
They also do not make zooms.
Voigtlander also makes fantastic expensive lenses for Nikon. I am partial to their 40mm f2. The 58 1.4 is very nice too.