Have a Dolphin Gray B7, putting an S4 Bumper on it, RS4 grille.

Got the bumper primer colored ... wondering what your recommendations are to get the bumper painted.

My car is still clean and was garaged enough that I don't think I need to have the paint matched, I think I can just drop the bumper off for painting then have them put it on...

What are your thoughts, should i let the dealership do this?