I've got a Specialized S-Works Roubaix with full Dura Ace components. I've also got a Habanero Team Titanium with full Ultegra SL components. I much prefer the ride of the Habanero, and am thinking about switching component groups between the two bikes. When I'm on the Habanero, I'm happy with the performance and function of the Ultegra SL, but when I'm on the Roubaix, I do notice that the brakes are better and the shifting just a hair crisper. So, what say you other 50+ forum members? Is it worth the effort, or is this the thinking of someone with too much time on their hands?