Try some new shocks/struts. They are primarily responsible for vehicle ride quality.
Are your tires in good shape? I would replace bushings only if I was experiencing a heavy knock or rattle or if a component was loose. Check your tire pressure and make sure that they aren't overinflated...inflate them to what the tire placard on the body or door recommends and not what it says on the tire because this recommendation is only for a fully loaded vehicle