I have to respectfully disagree with Triguy. Felt and Cervelo are both producing UCI legal bikes, that is they are building bikes under design constaints that a very few manufacturers arent. Felt and cervelo arent the most aero bikes around. The softride classic and rockeTTis a lot more aero (according to Softride's quoted research) than the P3 and I'm not sure about the P3c or P4. And replacing the beams after a few years? Its sounds better than replacing entire frames to me. Apparently carbon has a "limitless fatigue life" but the fittings in the frames and the bonds that hold them there do not. Carbonsports makes the nicest beam bike I've seen but no other beam bike, as far as i know, is designed to flex the way the classic softride beam is. As is mentioned above,the suspension is active enough to help you iron out your pedal stroke and its also active enough to help you corner. Tall headtubes? IF you're that flexible, get an ergostem or adjustable angle stem, no problem. Anyway, the rockeTT isnt the softride to go for if youre going softride, its just another stiff beam bike, liek the zipp and titanflex. They are aero but dont give you the benefits that the classic does.
thats the way i see it anyway