Performance shocks won't make the springs softer, but they will keep the car better dampened and you won't bounce after you hit the bump.
I tried to explain it above, but let me say it this way...with my H&R sports and stock shocks then switching to Konis, the ride was actually a bit more firm even on full soft, but the car handled better due to the better dampening. If you want a soft ride, don't go put Koni adjustables and crank them up thinking that will make it softer.
I've never heard of someone complaining about the ride quality of Prokits. Most feel that the H&R sports are a bit stiffer, and my 69yo dad still thinks my car rides just fine, even with 225/40/18s.