You didn't include all of the above, that's a tough question because no 2 owners or shops concentrate on the same details, some have engine/mechanical skills, some obsess on the body or suspension, some are good at making things look shiny, and some are just good at putting lipstick on a pig in all those areas you mention. Then there's the ones who call it a restoration when it's really a rebuild or customization, well done or not.
What exactly are you looking for here? Recommendations?, where to start?, what not to do?, what are your goals and budget?