Which would be better between pro comp ES9000 and Rancho RS9000? Don't see much of a difference in the description other than the price.

 

We carry them all but Bilsteins always get my vote.

 

In this order Best upgrades to a vehicle is tires then shocks.

Ride comfort is a by product of good shocks.

More importantly the shock is designed to keep the tire in contact with the road surface. Adding bigger / heavier tires and wheels and stiffer springs requires a shock with a lot more valving.

Trucks that bounce over bumps normally require more shock.

Question of what is a good shock for a truck? no idea. My Race car gets Koni and AFCO and yea they cost $$$$
Bilstien is always a good choice but make sure you get one built for your application.