You know, before you drop $300 or $350 on the most common Nikkor lens, you might think about waiting until you find one attached to an interesting vintage S3 or SP for a second body (afterall, Nikon RF cameras are a little like potato chips -- nobody can have just one). That's almost always the most cost-effective way to get a 5cm lens, since nearly every one of these cameras was originally sold with one. If you've got the pockets, you could also get the S3-2000 as a second body, and it comes with the very scarce improved version of the 5cm lens.
By the way, my gallery has a half-dozen or so family pictures that show the standard version of the 5cm 1.4 wide open. I've been meaning to update my gallery to show performance of the other Nikkors but haven't gotten around to it. It's worth mentioning that in its middle aperature ranges, say f/2.8 to f/8, the standard 5cm 1.4 displays bokeh that some Leicaphiles and Sonnar mavens would consider to be unflattering -- doubled lines and clumpy out-of-focus areas.