Rode with my factory Rancho's for 8,000 miles. This is my first truck, and was rather surprised at 3 things: how much I could feel on the road (small bumps, ridges, pennies, etc) , how hard they hit over speed bumps and the like, and also at the amount of "float" I'd feel at speed over bumps on the highway.
So I upgraded to Bilstein 5100's for $320(left stock rake, though) , and am happy with the results. I don't drive offroad much, but they handle all terrain that I encounter much better. Bumps, holes, ridges, etc. Smoother, more "grounded," and feels safer. I'd do it again in a heartbeat.