That's an immensely kind offer, thanks!
I'd be very interested to know how your car is with the Bilstein's fitted, I agree also that the tyres and wheels make a difference to the feel of the car, I am currently running Kumho Ecsta HS51 tyres, they have good grip but are let down by the fuel economy, my car still on the standard suspension springs and shocks is I'd say a medium firm ride. I generally read that Eibach's either Pro or Sportline are pretty much the same in terms of comfort just lower.
Your tyre/wheel size combination are unusual, I don't think we could make a direct comparison because of that because the tyres do affect the feel of the car so much.