I'm really enjoying the nikon offerings for 35mm lately and I'm quite fond of my F3. I want to eventually get a second body and I'm leaning towards an F4 body (with the MB-20). At present I only have MF lenses, and I don't intend to buy any AF lenses as I don't use Nikons for my DSLRs. Is it foolish to buy an F4 for only manual focus purposes? I know there is a K screen available but I understand its quite elusive and when it shows up it commands a stiff premium. Would the smarter decision be to just get another F3 or an FM2n?