They were wrong in a way on what they told you. The door is the best ride for comfort, but when towing you should air up.
My shocks are original and I was thinking of going to Bilsteins or adjustable Rancho. Would that be a benefit? Don't think they need to be replaced yet, but if it will help I would be whiling to do it.
When I looked at the Cooper website it appeared to me that the load range C and E have the same sidewalls just more layers on tread and higher load/psi ratings. I didn't plan on gover over my trucks max axle rating so the C's fit the bill. the side wall is much stiffer than the P's there were on there before.
