Trying to decide between Dura Ace and Ultegra. I'm in the process of replacing a bike, so I am using mostly insurance $. I had Ultegra in the past, and other than the occasional hiccup, i was pretty happy. I don't plan to race, I do group ride occasionally, and generally head out on 50-60 mile rides on wknds. Maybe ride 1-2 times during the week ... Is Dura Ace really that much better or is it just more gucci?