I have a Bianchi built with Easton Elite aluminum tubing. It has a rigid fork, I like that, kind of old school.
Other components are also aluminum, like stem, bar, seatpost, nothing exotic. running street tires, and
some older matrix/mavic rims.
However it is very bumpy, vibrations just transmit straight up to my spline. I have ridden stiff
road bike like old school Klein Quantum, but this Bianchi is more bouncy than the Klein.
I am just talking about flat road with less than ideal surface, not dirt road or trail.
I have a carbon bar coming, but I try to stay away from carbon seatpost...