Is Caesar the best choice in Fallout: New Vegas?

The man brings up a lot of valid points about how the NCR is making the same mistakes as the old USA. As well as the need to form a culturally homogeneous society, something that would drastically increase stability in the wasteland. The mistreatment of women wouldn't realistically last very long, and slavery would more than likely be abolished later on down the road in favor of the more efficient capitalist system. Any reasons besides those not to go for Legion?