No worries, hope they give you what you want.
As for which finish, in theory, I would guess diamond cut then lacquered would give the easiest finish to look after, and it's only cleaning the lacquer. However, if anything goes wrong with the lacquer (corrosion etc) then that would look pretty bad pretty easily. Polished is a hard one to keep clean, maybe longer lasting. As for powder coating, check the link about the risks with loosening wheel bolts. Coloured lacquer could be , or if wrong be
Decision time! What do they recommend?