The damage is fine, yeah. Since a good chunk of it is force, you shouldn't have to worry about really high damage values because more od the damage will be getting through defences.
It might be an idea to allow for multiple attacks as a full attack option, keying off your BAB. Basically treat each meteor like a normal attack and grant iteratives. Offers a little more to a gish build (if it can attain 9th levels this spell chain would be awesome for such), and offers more variety it spell application.