The midtone separation in this image is really nice. I would imagine this to be something the digital process is helpful in extracting.
If I'm not being too much of a bother, could you please commend on the lighting conditions when this was taken and the ASA at which you exposed the film?
As an aside, I have used HC-110 and D-76 extensively as well as a fair bit of DK-50 over the years. These days, I tend to use Pyrocat-HD almost exclusively but I have also been tinkering with D-23. D-23 1:1 fascinates me because of the way it handles compensation and mid-tone expansion with very long development but it's still grainier than Pyrocat-HD. Given the way Kodak is pricing things these days, a "make your own" developer like D-23 or Pyrocat may be preferable. HC-110 is being priced at insane levels.