I own a factory converted one, too, and it's one of my favorites, along with the 105/1.8 AIS. The fast medium length Nikkors are so nice for portraits!
I won't use current models exclusively because you can find just about anything if you look -- it doesn't have to come only from a retailer.
I LOVE my 85mm 1.4 AIS, 25-50mm AIS, 16mm Fisheye AIS, and 50mm 1.4 AIS.
If I had answered this thread when it was first posted, my answer would have been:
35mm f/1.4 (this lens replaced 35mm f/2)
85mm f/1.8 (this lens could be replaced by the f/1.4 version)
180mm f/2.8
My answer today is the same.
When I worked for a newspaper, these three lenses could handle 90% of my routine assignments. One reason I did not replace the 85mm f/1.8 with the f/1.4 version was that the 1.8 version used the same filter size as the 35mm lens.
16mm f2.8 fisheye (not as extreme as other fish-eyes and covers the entire frame)
300mm f4.5 IF ED (amazingly small and well built, tack-sharp wide open)
600mm f5.6 IF ED (I paid less then $1200 for mine, so it's under the limit, amazing lens comparable to others costing thousands more)
I own a factory converted one, too, and it's one of my favorites, along with the 105/1.8 AIS. The fast medium length Nikkors are so nice for portraits!