I had the double-adjustable Koni's on my Roadster. Upgraded from the kit-supplied and very cheap Pro Shocks (not sure they're in business anymore). The Koni's were great on the street and track. I didn't play with adjustments very much - honestly all the adjustment was overkill for a guy with my experience level.

I'll be using the red Koni's supplied with the 818R kit. I haven't seen/heard of any complaints. It will probably be a while until I have the experience/ability to benefit from an upgrade. Bang-for-buck is extremely lopsided when it comes to shocks (i.e. - not much tangible benefit from all the $$$ you could spend).