How much does the advertised spring rate really affect the ride of a truck? I currently have 4" pro comp lift springs on the front of my blazer rated at 520 lbs/in. The tuff country "Ez Ride" 4" springs are rated at 295 lbs/in. I am looking for a softer ride, right now I am runing a single shock at each wheel also. Will switching to these springs make a big enough deal to justify buying them?