You might consider going with a vinyl wrap to get the color you want. This way the factory silver paint will remain. The vinyl wraps are a bit less expensive than a respray, look just as good if done well, provide some protection for the paint, and if the paint and body on your car is in good shape already, should require a bit less time in the shop than a repaint would.
I have no idea though on reputable shops in the LA area to do wraps.
-Rod