I paid for tuned shocks from accutune and have been pleased with them more than any other. These are under the bed of my 18 F180. They are fox adjustables and they asked for how much weight I carried in there daily, etc. if I could have done it differently, I would have said NO weight, for a slightly softer shock. I run mine on the second to softest setting for daily drives. Saying no weight would allow me to dial up or down instead of being at the bottom. (I’ve got a 250lb shell and a few odds and ends in the bed).
For atruly a truck that doesn’t go bouncing washboards off road at 30+, I would not recommend the bilstein 5100. That shock has less rebound and more compression dampening, especially as they wear, and on the highway this can lead to a pogo-stick effect. I found the 4600 to be much more suitable for a highway vehicle. That said, an empty truck bed and a 4600 can be a stiff ride. If you can find it, the Monroe reflex has always felt good to me for a larger vehicle. They are a linear shock (which I personally prefer).
Ok so thats also a point. The softer ford suspension may very well be valved linearly, so a matching valving in the back is a good idea - Gabriel Ultra would get a nod there. If it’s an STX with the stiffer ride, I’m pretty sure they are progressively valved, which will match a 4600 better. I think.