Upgrading Your RAM 3500's Suspension for Better Ride Quality

As a long-time owner of my RAM 3500, I've been looking to upgrade its suspension for better ride quality. The current setup has started to show its age and I'm curious to see what improvements can be made with aftermarket components. Specifically, I'd like to explore the possibilities of upgrading the shocks, springs, and possibly even installing a lift kit. Has anyone else done this or have recommendations?