I might give those rancho 9000's a try. I guess it would be too much to hope that someone in the DC area has the 9000's on their F150 with 20 inch wheels and would be willing to let me take a ride and see what they're like...
Yes, I do have the Pirellis. I'm guessing the ride would improve some if/when I replace them with some nice LT tires. I'm just not too excited about dropping another grand for new tires on a brand new truck.
Hopefully the shocks will make a huge difference. If not, I guess I'll look into swapping out the 20's for 18's and getting some better tires at that point.