I am sure you will get a lot of advice so I will throw in my 2 cents worth. I would suggest the CB or Cm 400 or 450s. The hondamatics. They are smooth , easy to ride , easy to maintain. They will cruise all day at 70 with 2 up and give you about 50 miles to the gallon. Cost about 1500 and up depending on condition .Parts are sometimes a problem but you will have that with any vintage Honda. The electronics are a little difficult with the built in safety features but there are people on this site that can help you with them. Weigh about 480 lbs wet. Just my thoughts.
Bill H