I'm curious how much they quoted you. Did you bring the wheels in with you so they could give a accurate quote?
When I had the wheels done for my cars they quoted me $125 or $150 a wheel. That included repainting and polishing the lip. I only had pebble sized nicks here and there on the rims.
For major repairs I wouldn't hesitate going to them but, if you can find someone that will repair curb rash for cheap, fair price in the bay area let me know. Always good to have a few options.