I've used Mothers, good results. I like Meguires also, it's as good or better than Mothers California Gold. I tried Turtle Wax's Colour Cure and it was good at getting rid of some scratches... but wasn't very shiney.

Meguires GOLD is good at getting very shiney... but not that great at getting rid of scratches as good as the Colour Cure. Least not on mine.