Hi ~ I have Campy Chorus on my Aegis, Shimano Ultegra STI on my Terry, and Shimano mix with bar-cons on my Bike Friday. Campy is hand's down my favorite. Love the shifting (it's non-indexed in the front shifter, which makes derailleur trimming much easier), love the clean look of the cable routed under the bar tape on the handlebars. To me the only downside of Campy is the cost, but it has been worth it to me.

Emily