My '04 ES also has a bunch stone chips that are unsightly. I'm dropping it off tomorrow to get the hood repainted. The collision shop is one I've used on several occasions, they do great work. They quoted me $411.13.
Isn't the hood on the RX smaller? Does that quote also include your front bumper?
I'm also getting my front bumper replaced because some idiot backed into it with their trailer hitch. It's covered by my insurance though. The quote for a new front bumper, the styrofoam absorber behind it, paint and labor is $654.67.
If that quote was only for your bumper and hood, I would go elsewhere.