Key points were touched on above. Thanks fellas.

To summarize:
Spring rates should be matched to tire grip for roll control. 205 NeoGens are somewhere between our "550/350 Touring" tire recommendations and the more sports-oriented 700/400. That's a tough call, I would have told you to pick a discipline or priority usage, daily ride quality vs weekend sportiness.

The Xida valving is very broad, so springs in the middle of our range like 700/400 will want damper settings more towards the middle of our range as well, a couple clicks up off of full soft for the best body control/ride quality.

Our recent experiences with the "Super200s" lead us to 800/500 most of the time. They are as fast or faster than NT01/RC1 level Rcomps.

Can anyone compare the 700/400 or 800/500 ride on the street to a 3/4 ton pickup? I want the car to be competitive in STS but I've done the race car thing and I want something that I can take out on the weekend. TIA

Cadillac-----------Cayman------Xida----------------------------------my stock GTI-----------------------------------3/4 ton--------------our 1 ton dually------the back seat of the schoolbus

The new Chevy 2500 Duramaxes ride incredibly well, I'd say better than my Miata. But compared to a Ford or Dodge, the Miata is probably better... but at that point it's very difficult to differentiate ride quality from ride stiffness.

one thing I DO know is that you can hold a conversation at a whisper at 85 mph on the freeway in a new Duramax. On concrete, with expansion joints.