I've been curious about the DS series and how well they work on the road.If you wait, I can tell you how well what I have decided on works?
Trying the new BC racing DS series. Has 30 adjustments for rebound and compression with Digressive technology and they have spring rate options. (1300.00)
Since it is a daily driver on poor roads going with 5kg/7kg springs and the adjustable extenders.
I am not going to track it or race it just for the adjust ability and ride quality.
I'm also considering switching out my springs from 8kg/8kg Pedders to something like 6 or 7kg Swift fronts and Lovells 20mm drop rears (~7kg).
Very interested in your observations.