Carbon is the way forward. Sorry if people don't like it but carbon frame manufacturers are still learning how to get the best from the material and achieve stiffness with compliance in the right areas. I own a 2006 and a 2013 Roubaix and the difference in ride and handling between them is amazing.
Very true. But there's more to riding a bike than the 'best material' isn't there?
What's the best bike in the world
The one you're riding.
And it doesn't matter what that bike is, what it's made out of, how much it cost, or what components are on it. If you ride it, than its fine.
If you're the sort of person that MUST have the BEST or the LATEST thing then fine, that's ace! But be honest about it. There's someone else having a whale of a time on a £150 bodge job. And if you're not, then you've missed the point.