There are no dumb moves, only decisions that you may later regret.
I would sell the PC lens that you never use and keep the rest of the Nikon gear. There are some things that a 35mm SLR is better at or nicer to use. If you get a 35mm RF, while that would also nice to have, just kind of repeats what you have in the M9.
With the Nikon SLR, you could scan the negatives if you want the best quality. Why would you do that with a RF. Probably are reasons, just not as many.
Of course, like others, I am better at buying and keeping rather than the revolving door camera owners.
So, its your chance to regret what ever you do.
If you want, send me the F6 and I will take it out and make sure it gets exercised.