Spring and shock combo most definatly for bumpy twisty roads... ive noticed from personal experience bumps on corners with my coilovers dont go well ive never lost control of my vehicle
but just standard driving cause the front to travel till it found the road again... Then be worried about the rear kicking out...

Pedders spring and shock setup would most likely be the go man they lower your car and theyre
built for those bumpy conditions... The popo's use pedders in the pursuit cars...