Has anyone switched from Shimano to Campy or own both? If so, what do you like about the Campy and if you ahd it to do over, would you still make the switch. I am thinking of buying a new bike and thinking of going with Campy Chorus (if I go Shimano, I'll go Ultegra). I currently have Shimano 105 (with some upgrades) on my bike. Thanks!