By 'sharpness', think MTF. How apparently 'sharp' grain appears can also relate to the grade chosen for printing. You'd be surprised by full strength ID-11/ D-76 with good process control.
There's not a lot of distance between Ilfosol 3 and FX-39II, at least in terms of their intent. With a condenser you're probably not going to run into issues with getting to higher CI's.
As for 'fast zone focusing', Konica Hexar AF. What fast action are you needing to stop absolutely stone dead anyway?
I'd add the wonderful and underrated TMaxDev to that group of FX-39 and Ilfosol-3, though the former two are very good for pushing 400 to 1000, so maybe Ilfosol-3 doesn't deserve to be there.
About stock D-76, I wouldn't be surprised: I was. I started a thread on it last year or the year before that. By the way, half members, all 1+1 users, shouted loud.
I like D-76 better than Xtol (here come the other half) because of D-76's tone for overcast scenes.
I bought my Konica Hexar AF, silver edition, ten years ago. One of the most interesting cameras ever IMO, because of its capacity to retain an aperture but being able to change it if light absolutely orders so. But it's far from optimal for street photography: its AF system can go for the background easily in such situation, where we move and subjects move, not too fast, but all the time. After a couple of unforgettable images focused a kilometer behind my subjects, I stopped using it for street.
And we never think of freezing action in street: that was not the reason for all I wrote, but the need of comfortable DOF... We have a central focusing distance for most photographs, and a second one if subjects are really far from camera, and those two are totally easy. The real game is, the third focusing distance: the closest one... That means very shallow DOF; without focusing, we need to have very well focused our near subjects, in the 1-2m range, even 0,7-0,9 for a common and sometimes necessary head shot. That can't be done with a 50, can be done at f/11 1/2 with a 35, and can be done at f/8 1/2 with a 28. That's why I use my 35 at 1000 (Microphen) but I use my 28 at 400 (D-76).
Many good tripod photographers feel they started learning photography after leaving the tripod, when they tried to do good street photography for years and got nothing.
Others were never able, like Ansel Adams, who felt himself his books were so horribly cold he had to use Cartier-Bresson inside.
Joking apart, hope this helps.