I have an 99.5 1.8t A4 Quattro that is literally slammed (speed bumps are hell) and the ride is still smooth as butter. Granted, it has a premium coilover suspension on it, but lowered cars usually ride alot rougher than mine. It has 139k on it and the only problems I have had with it are with the turbo (that is far from stock and pushes 23-24 lbs of boost) and that has no bearing on Audi's manufacturing. I have always owned German vehicles, and while they can be cranky at times, I absolutely love the Autobahn-inspired engineering.