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7800 is whats needed - a groupset that is both beautiful and works
7700 is more beautiful, even if 7800 works better. If you're riding a Mapei Colnago, you already have an aesthetic sensitivity deficit, so you might as well get the most recent groupset; since Dura Ace gets uglier with each generation, 9100 might just be hideous enough to draw attention away from the appalling frame decoration :)
@PhilDAS Dura Ace 7800 is whats needed - a groupset that is both beautiful and works
(I think I have pretty much a full groupset kicking about if anyone's working on a nag)