I ended up getting the older Koni non-gas reds for the front of my Spyder. I left the adjustment at full soft/slow rebound(factory setting) and couldn't be happier.
The ride is smooth and supple but they react well to sudden bumps. The Spyder rides nicer than my Cayman, although the Cayman does have 18" wheels with very short sidewalls. Possibly I need new shocks on that at over 100k...
No rears, my Spyder has coilovers and no torsion bar in the back.
Koni shocks are very nice indeed: recommended.