I'm in the market for n+1 too. Looking to upgrade from my Felt Z85, which I absolutely luv, but I want full carbon, disc brakes, and something a little snazzy. I've narrowed my search down to the Canyon Endurace, Cervelo Caledonia 5, and Bianchi Infinito. Actually, I rode the Bianchi about two years ago and decided that was the one. Fast forward two years, now that I'm ready to pull the trigger I'm actually leaning away from the Bianchi. The issue is I haven't rode the Cervelo, because LBS has pre-sold the next couple of shipments of Cervelo's basically so it may be a looong time before I can unless I get in the "pre-sold" line, and of course, I can't ride the Canyon.
In any case, perhaps I can both benefit from the feedback you're getting too.