I've owned F, F2, and F3, although I liked the F2 best, there are many other bodies that are just as good in the same price range, then a few that cost more but are worth considering. At this point we have left the world of intermediate cameras. Canon F1new, Olympus OM4, Leica R5 to R8, Pentax LX, Minolta KX, Contax.
When upgrading from F2 to 3 I really came close to a Pentax LX.
In terms of an intermediate camera, Konica T3, full read out in the viewfinder, flash syn 1/125th, mirror lockup all metal shutter blades, shutter speed preferred and manual exposure, meter is accurate. Meter will work with 2 hearing aid batteries. Lens are very good, over the years I have heard that the Japanese Government used the Konica 50 1.7 as the bench mark when testing 50mm lens. A basic set, 50 1.7 or 1.4, 135 2.5 or 3.2, and 28mm 3.5 will run under a $100. Lens range from fish eye to 1000mm. A few fast lens 57 1.2 35 2.0 and a 85 1.8. Konica is common, lots of T and T3 were made. The follow up camera the T4, is not as well built as the T3, but takes a motor winder.