Ya I was hoping to track this a LOT more, but just never got into it and when I felt excited for the spring to track - COVID shut down everything. It sounds like you *might* be a B6 potential owner, but I agree the B4's are still likely the better way to go. The B6's are a bit more stiffer, but there isn't a road I have really driven on that I can use 'Race' mode with them. Maybe a nicely prep'd track, but when the whole stiff chassis is bouncing around I feel like things are too stiff to be effective.
IMO I think the Eibach springs do tighten things up a bit too I am sure with the B4's, and I think that would be the perfect set-up. Then get a DCC controller if anything just to fine tune things. I assume you can go a bit more stiffer too, but I feel like daily, the B6's you will need to go softer with a DCC controller, and barely use the stiffer end of things regardless.
I must say though, OEM set-up, I enjoyed Normal and Race for DCC. Never used comfort. Now I only use Comfort (daily) and Normal (fun). I need to find somewhere special to use Race