I've always deliberately avoided the Eiffel Tower myself. The Louvre is very much worth visiting even if it's largely frozen in time and the most exquisite works are sort of overwhelmed by the vast numbers of technically excellent but IMO often not terribly interesting paintings. (How many Renaissance Madonna and Childs can you look at in a day?) TBH, a more curated Louvre would be a more interesting museum.

That said, if I'm having to choose, I'm probably going to the Musee d'Orsay rather than the Louvre.