Need help picking a Paris hotel?

We will be traveling to Paris. We need to stay in a Marriott hotel if possible. We could also stay in a Courtyard or Renaissance because they are owned by Marriott. We want to see the Eiffel Tour, the Louvre, etc. My son also wants to eat at a sidewalk cafe. I'd like to stay at the Renaissance Arc de Triomphe on 39 Avenue de Wagram but it is more expensive. We could stay for a lower price at the Marriott Rive Gauche or the Renaissance Paris La Defense. Please help. I don't know where to stay. Thanks so much!!