Changing to CO's for me are not what I want to spend at this point. However, I would like to have the best ride possible. I currently have the AEV 2.5" with Bilsteins. Would upgrading to King shocks be a major improvement in ride quality on and off road over the Bilsteins??
Ride quality is 100% subjective and for the most part, ride quality comes from spring rate with shocks helping out and even things like tire pressure making a difference. Depending on what you're looking for in a ride, King shocks may make an improvement for you but, far from what I would consider to be, "major". Coupled with a set of Plush Ride coils, I personally feel they are a much better setup than most other setups but, I prefer a soft comfortable ride over a harsh one.