The best bikes for touring that were made in the 1980's were the ones targeting triathletes. After the long swim for the first event the riders wanted a stable bike that was easy to control and so the bikes had less severe head tube angles and more fork rake. A good example is the Centurion Dave Scott Ironman bike that I owned until a few years ago. Only downside for me is that it used downtube gear shift levers. It was very stable at speeds over 50 mph on pavement. But for it having 10 speeds and no brifter gear/brake levers, it is as good as any bike made today. At the current time I would look at what are termed "endurance" bikes.