IMHO the Nikkor 35/2 is the only truly excellent prime Nikon makes from 20mm up to 35mm, at least with auto focus.
Having said that, if you want a 28mm I would advise picking up a manual focus 28mm AI-S which blows the doors off any of the aforementioned primes including the 35/2.
The 28mm is a nice lens though, and useful if you want to mess around with reversing rings. Personally I prefer the 35/2 over any of the 28mm AF's - but the 28mm f/2.8 AI-S is in a different league to any of the other auto focus "wide" (20mm to 35mm) primes.