I have been a Nikon user for many years, mainly due to the fact that my father was also a Nikon user going from the original F up to the F4 with FMs and FEs thrown in for good measure.
I have only ever had zoom lenses but this time last year I decided I wanted some Nikon prime lenses (28mm, 50mm and 135mm). The problem was I couldn't afford them.
Then I discovered a Minolta XE-1 for sale with a 50mm f1.4 lens so I bought it. I also bought 28mm and 135mm Rokkor lenses. I think these are equal to the Nikkors but are available at around a quarter of the price.
I have since been given a Vivitar series 1 28-105mm zoom (67mm thread for the lens geeks) but I have not had a chance to use it.