I recommend the BD alpine carbon poles.
Aluminum poles transmit far more shock than the BD carbon poles. You should easily be able to verify this by knocking around the BD carbon and aluminums poles in stores.
Carbon definitely is used to dampen vibrations and carbon fiber is often used for such applications.
You will be hard pressed to break the BD carbon poles, although other carbon poles, ie, tigoat, are definitely not as durable. I've EXTREMELY tough on gear, but I trust my BD carbons so far. I've broken tigoat carbon poles simply by pressing them hard into the ground with arm force, not even tripping.
Finally, if you are still worried, you should 1) buy from REI or some other company with a bulletproof warranty. 2) know that BD will probably replace the poles at their cost to make you happy even after the 1 year warranty 3) BD sells replacement pole components, ie, the lower section which is most likely to break.