All coils aren't harsh, it depends on what spring rate you get. Eibachs are nice but might not drop as much as you want, and I would recommend getting some aftermarket struts because your new springs will be underdamped with the stock struts and they will wear out faster.. I'd go with some luxury street (not street/race) coilovers if you want a nice ride. You don't have to compromise your nice ride quality if you don't want to.