By lowereing the suspension you are taking the vehicle out of the factory designed "movement range". Thus the reason for premature ball joint and bushing wear. Lowering the vehicle will also affect how the car handles. It will be better in dry weather... but will tend to want to slide on wet or snowy roads.
The reason for that is... there is a certain amount of body roll designed into ALL vehicles, by the manufacturer. This is to help the vehicle stay on the road during turns, curve, or aggresive driving. The "factory ride" is designed to be the beast of all worlds. Most times... when you modify the suspension, you sacrifice one thing for another. Since you live in Minnisota... if this is your daily driver... I wouldn't recommend lowering your LS.