One question for you lopony - When you had the C-springs did you also swap out the shocks/struts for something else? I've heard several people complain that the C springs were too harsh, and then they went with a Bullitt setup and were happy. The thing that I find strange is that the Bullitt springs are 600 lb/in in the front and 250 lbs/in in the rear, and the C-springs are 650 front and 200-300 rear (progressive). Compared to the stock rates of 450 and 210, the C springs are only a touch firmer than the Bullitts.
Thats why I'm guessing you used stock struts/shocks with the C springs which gave you a harsh ride??? The stock struts/shocks aren't a good match but the Tokico HPs seem to be. (the Bullitt struts/shocks are essentially Tokico HPs)
edit - I ask this because I think Santa is bringing C springs.