Couple of thoughts:
The Naniwas are everything you've read about them.
IMHO, you would do well to consider something between 1K and 5K. I have a 2K which I love, but I understand the 3K serves as well.
The 12K is a wonderful finisher in its own right. Maybe as good (in my hands) as a Nakayama (I have three).
AFAIK Tony Miller is out of the strop business -- unless he's changed his mind. I agree with the choice, though. I have several hundred items in my shaving collection, and the three I will never part with are my brace of Le Grelot 1/4 grinds and my Tony Miller horsehide. (Ooops -- forgot the MWF).
Double ooops -- forgot the Naniwas.
Final thought -- welcome back!
Edit: Triple Oops -- I just checked his site, and Tony is back in the stop business! What a blessing to all of us.
So, a double welcome back!!!