You're Welcome! Regarding your debating dilemma on paint and center caps.....ALL personal preference, but here are some ideas -------->
First - IMO, these particular rims look best with the center caps, which as anyone can see, are very unique! I have seen some other trucks on here with aftermarket rims that look great without the center caps.
@BroncOh truck that sits on rims with the classic round holes comes to mind.
Second - Removing all of the black hex and allen bolts and painting the rims the body color of the truck is personal preference. IMO, these rims painted to match the following three OEM colors: Carbonized Gray, Stone Gray and Darkened Bronze would look great......and Oxford White might look good too, especially if the truck owner lived in snow country...slight camo effect...but, would stand out without a snow background.
If you decide to paint your rims Oxford White, consider the following changes ----------> 1. Black Door (Grab) Handles; 2. Sand, Prime, and Paint existing grille Black (this would be tedious with that grille); 3. Paint the area behind the F350 alpha / numeric characters on the fender emblem Oxford White; 4. Change the mirror caps to Oxford White OR sand the existing mirror caps, then prime and paint Oxford White.