Duncan, I got the 18x8s. I was leaning towards the 17 inchers, but a 215/50 tire is an awkward size; not wide enough and too tall of a sidewall (visually).
06Shadow, the suspension made the noise prior to me installing the Pro Kits.
I'm leaning more towards a lower suspension arm issue, particularly with the bushings. Another poster on here found that the LCA bushings were supposed to be greased from the factory, and his were not. I've yet to explore that possibility, but in the meantime, I'm stuck with an uncooperative Ford dealer that refuses to acknowledge anything while others have had no issues getting dealerships to remedy their suspension problems.