I would be careful on which exhaust you buy. Some are prone to droning at certain rpm's. I bought a lower priced dual exhaust for an 08 F150. Sounded good 95% of the time. Problem was when towing at a certain rpm it droned horribly. It's now sitting up in my shops attic.
Not sure if you visit any F150 forums but if you haven't I would go over there and find out which ones deliver the best sound and performance. IIRC you need to get into the $500.00 range to get both.
IMO nothing sounds better than a V8 with duals. My son has a Ram 5.7 with factory duals and it sounds nice. Neighbor has a Nissan with duals, as well as another with an older Toyota 4.7 V8. Both sound great.
If you have the coin I'd get duals for the sound if nothing else.