I think any active suspension mechanism is going to trump the "magical ride properties" of any frame material. Despite the endless blather about "laterally stiff, vertically compliant" frames, the only suspension component in any standard road bike is the 1-1.5" of compressed air between the rim and the ground. My LS Vortex has curved seat stays which, if the ad copy was to be believed, smoothed out the ride, but I don't believe that this frame is any more compliant or forgiving as an equivalent straight-stayed frame. The stays look pretty though. Different frame material, thicker bar tape etc may affect road buzz or chatter, which is not insignificant, but when it comes dealing with actual uneven pavement, tires trump frame material, and active suspension trumps both.