You look a bit all over the place. You have the 67, a tiny XA, a digital and a manual SLR. All valid options for a kit and they don't necessarily replace each other. What are you going to shoot?
However, if you want an all in one, sure get the F3. I had the F3HP and F3, I wear glasses, the HP is marginally better but I did fine with the plain F3. So I wouldn't worry too much (or spend a lot more) to get the HP if I were to get one again.
I've also owned Hasselblads (501CM, 500ELX and the H2F which is a different thing altogether. Consider that with a Hasselblad, handheld you get a shutter speed of 1/60, 1/125, 1/250 and 1/500 to use with a 80/2.8 lens. So do the math and see what film you need. Also, Hasselblads currently are stupidly expensive, you can sell *everything* you have and still not get one, you now need a good 2k for an ancient 500CM kit. Plus servicing. You also get a very slow to operate camera plus you need to make sure you get one of the later focus screens as the old/stock ones for 500CM are just plain unusable (in my opinion) unless you're on a tripod and have all the time in the world to figure out focus.
You could get a TLR if you want to stick with MF but again, different things. Personally I'd rather have a Mamiya C TLR than a Hassy, even better a Rollei 2.8.
As for Leicas, well rangefinders are great and I have two (film + digital) but a 50 on an SLR is much more versatile given the 0.7m focus limit on the Leica. Also...a body in good condition is more than an entire F3 kit.
Back to the F3, great camera, loved mine, preferred it as a manual option to everything but the Leica R8 (which is more expensive, has fewer lenses and are more expensive).
So yeah if you want a manual SLR that does the job and has autoexposure, the F3 is simply excellent. Add a 28/2, 50/1.2 and whatever tele and you're still very budget friendly. It is a setup that simply lets you fully explore what can be done with 35mm film.
One more thought: if you want manual focus and are not averse to more electronic cameras, a Canon EOS 1/1N/1V/3 with the Ec-S screen is just as good (or maybe a bit better...?) for manual focusing. Get a Zeiss ZE 50/1.4 or ZE 50/2 and you've got a superb manual focus camera that will also work with the latest gen EF IS telephotos. Just a thought. A 1N isn't even much heavier than the F3, has just as good a viewfinder and is half the price.