For looks, definitely Campagnolo Super Record, vintage 1983. It just never gets tiring. It's also an amazing group for durability. It's some of the most crashworthy stuff. These days, bike racers are expected to plunk down piles of cash for new stuff every two or three years. In the 80's you would buy a bike, crash it, fix it, and repeat many times. If that is your mode of operation, nothing beats Campagnolo.