So I have a Nikon F on its way. I'm starting with a Nikon 58mm f1.4 and 28mm f2.0 both non-ai. I plan on getting a Nikon 105mm f2.5, non-ai (sonnar version). I think that a Nikon F + 58mm f1.4 + 28mm f2.0 + 105mm f2.5 will be a decent Nikon F starter kit. Maybe I'm getting ahead of myself but now I'm wanting to know more about the bodies. 1. Is there a "preferred" screen for the Nikon F. I do not know how good/bad my screen is but with some cameras like Rollei and hasselblad, everyone wants to get a Maxwell/Acute Matte D, etc. I'm used to Leica M RF's so I worry that screen brigthness and contrast might be a problem. 2. My next body would probably be an F3 or F4. Basically some body with motordrive. Is there a reason to get an F3 + MD over an F4? Are the screens between the F's, atleast the first four, interchangeable? I'd think that the F4 screen might be even worse since it is an AF camera. 3. Glass-wise. Is there a preferred low-cost 20mm? I'm thinking 20mm f3.5 UD or one of the AI/AIS ones at comparable speeds. Or just opting for a CV 20mm f3.5.