I have read that the Fuji system is a good macro system, thanks for suggesting it.Another camera to consider is the Fuji X-H2, which offers 40 MP on an APS-C sensor.
I appreciate the discussion on FF vs Crop sensors, it helped pointing me in a good direction. I have been reading the R7 manual and noticed that the section on "shooting with speedlites" says that the R7 will work with the Mechanical and EFCS but not the electronic shutter. I called Canon CPS to confirm and they advised that "yes", it will work with my older Canon flashes (Ex series and the MT-26ex twin lite) but it was designed to work with EL-1&5. That's good to know.