I've been riding Daytona for 2+ years ...
Same as Centaur, different name. I love this stuff. I'm a big sucker for high end bike parts and my bike is now loaded with overpriced parts. But - I cannot justify "upgrading" the Daytona/Centaur drivetrain. The shifters are fine, even with bushings instead of bearings on the pivots. Besides, replacement bushings are available if they ever start to feel sloppy. The derailleurs shift as well as anything I've ever used. I did upgrade to Record hubs and cassette however. If I were to do it again I would save the money and stick with the Daytona/Centaur hubs and use a Chorus cassette.
I also use the Daytona crankset as well. I find no weight or stiffness advantage to upgrading to Chorus. The Campy BB is very smooth, but it is a brick. For that reason, I use a FSA Ultimax Carbon, 110.5mm, ISO taper, Ti bottom bracket. Although this item is listed on their website, it is not an easy item to find. I've had several dealers tell me this part does not exist. So I called FSA direct and Tom admitted that they do not make many and did not know when he would be receiving a new batch. Then he offered to send me his own leftover Campagnolo Daytona BB to use on my bike until they received a new shipment of the ISO tapers. How's that for service?
The rings which came with my Daytona crank actually had Chorus tags on them, but I mounted black TA Horus 10-speed rings because they're sexy. I put on some alloy chainring bolts as well. There is nothing wrong with the stock rings and they definitely represent an excellent value.
I could not be happier with my choice of Daytona/Centaur parts. I think that's a pretty good endorsement after 2 seasons, headed into a 3rd year on these components.