Springs are only part of the ride quality equation. How are the balljoints? Old stiff ones really make it ride rough. Struts? Crappy ones let the front end bang around, and/or won't properly control the spring rates. Any c/c plates? Good ones give you more bump travel. A-arm bushings? Crappy ones make it jiggle and feel harsh. Practically any spring can be comfortable, if you take care of the rest.