p2000, ignore frame materials and just ride a good selection of bikes in your price range that suits your cycling needs. You may still end up with a carbon frame or you may take that Bianchi steel one home.
Carbon seatstays absorb some road vibration, as do carbon handlebars, carbon forks and carbon seatposts.
There are different types of carbon fiber and depending upon how they are laid up and/or mixed together, the frame will feel different.
For example, Orbea has three different carbon frames. Opal, Orca, Onix. The Opal is extremely stiff for maximum power transfer while the Orca is made to ride long distances(it's what Euskaltel-Euskadie races on ). The Onix is a more economical blend of carbon fibers that's stiffer than the Orca but less so than the Opal. Still a sweet ride, though.
For $1500, you aren't going to find a full carbon bike from a company like Giant, Trek, Orbea, etc.
For someone your size who isn't interested in racing, I'd consider some of the new steel frame bicycles. Perhaps the Bianchi Eros for $1300.
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