Here's my experience. I have a little over 100k on my truck and wanted to replace the front and rear suspension. I ordered bilsteins and new springs that were listed on ac delcos site as replacements for the truck. I had everything installed in January and it rode extremely stiff. I bought a set of quick struts to try out and put them in myself yesterday. I noticed when I took out the bilstein/ac delco setup that the front springs were almost twice as thick as the monroe setup and they had another coil or two. So I'm pretty sure the spring was the culprit in it riding rough. I put the Monroe's in and it rides better but still no where near how smooth it did from the factory. I still have the rear bilsteins and ac delco rears in.
I'm attempting to find a set of complete take outs to swap in the front as well as take out rear shocks and springs. I don't have the tools to swap the front components myself but I can if it's already a complete assembly so that's why I'm trying to find something completely assembled.