Bikes have changed a lot since your last one (or even my '06 road bike). You may want to visit a shop to test ride some road, hybrid, etc. type bikes to see which you might like now. Geometry has changed somewhat, as has technology. I wouldn't worry an awful lot about disc vs rim brakes, unless you're riding in inclement weather, or flying down hills, as modern brake pads, as well as some brakes, are lots better than on your 80's bike. And the right size tire run at less than max pressure may soak up some of the bumps (assuming the bike can fit wider tires which you can run at lower pressure-making fork mat'l. less important). First things first--try some different types of bikes--that way you'll know what type to start looking for--and best o'luck! I've been thinking of adding a hybrid, but haven't much luck either finding a good used one with specs I want--thinking if I do add one, that I'll have to go with new.