[aerohead]

Lowering,by itself,may not achieve the lowest Cd.Low drag concept cars as the Probe-IV not only lowered the nose,but also raised the tail for out-of-town driving,configuring the 'rake' of the car for overall lowest drag.This is something which a full-scale wind tunnel would be handy for ascertaining.
I'd be inclined to maintain a 'factory' suspension.