I have to respectfully disagree with Mr. fjyang. Softrides, are not simple bikes, the beams are under a lot of stress and have been known to be replaced every few years depending on the rider. Additionally, they have tall headtubes for their reach. They have wide downtubes and Zipp's 2001/3001 was a much more aerodynamic bike.
I would stick with recent bikes. I can understand the desire to have a Softride, but I think you would be just as fast and comfortable on a Cervelo Carbon bike or Felt Carbon bike.
Good luck choosing.