Based on what you said I would go with Campy. I have ridden both Campy, Sun Tour and Shimano 7400 (just sold on eBay). I switched to Campy in 87 because I was riding crits and the index shifting made a HUGE difference in those races. But, you aren't racing, you are just enjoying the ride. I would go with the Campy. Beauty, durability, heritage and damn good performance.

1. Campy
2. Suntour
3. Walk
4. Shimano :-)

Now, here is my stab at changing the questions. Don't forget the overlooked Victory group from campy. It was quite good. Also, to go a little off the beaten path, Mavic had some good stuff with the late 80's (I think it was the 801).

GG