If you want an all-round setup for the best cross-country pace on A and B roads, then Williams has got to be the way forward.
My old Valver was lowered, firstly on big wheels and then on some original ones. The handling was way better on the smaller wheels - probably because of more flexiblity in the tyres. Then I found out that handling can be better when the car is not lowered.
When I got my standard Williams, I was blown away by the suspension. Its obvious that it relies on the full suspension travel and quicker rebound rates. More travel means that the wheels can travel further in/out of the bumps and the higher rebound rates mean that the wheels will stay in contact with the ground more by reacting quicker. The Willy is alos far more controlled half way through the travel and rarely bottoms out (so no skipping across bumpy roads). Theres a little more body roll and a weeny bit less lateral grip than with my lowered cars, but I cant stress enough how much better this setup is for someone like me and my driving.
I guess that it totally depends on what sort of driving you do, but my point is that if you live in an area with loads of B-roads then lowering to the floor isnt always the way forward. In your case, Id consider uprating the shocks to adjustable ones, but leaving the ride height the same to start off with.