"Yes, that's right."
そうです means "that is so"/"that is right"
そうですよ implies that you're trying to convince or educate the listener. It is often translated like "It is like that, you know!"
そうですね asks for affirmation. It means "It is so, isn't it?" But it can also stand for contemplation, as in "Yeah, it is like that, isn't it. Hmm..."