I started on a Specialized Sirrus sport. I am hovering around 325# down from 385#. I feel I have out grown my flat bar bike. I consistently go on 40 mile rides and feel great. I am planning on a century in the next few months. I am in the market for a real road bike. I have my eyes set on the Felt Z5. I already have a set of 36h Velocity Deep-V's so I am not concerned with the wheels. Should I hold off on the carbon fiber bike or will it hold up?