When frequenting Michelin-starred restaurants in Paris, you can save big bucks by visiting them for lunch rather than dinner. The food's the same, but the prices are not.
I have been deterred from vising Taillevent by the sky high prices (especially with the atrocious dollar-Euro exchange rate), but I have had a wonderful lunch at
Les Ambassadeurs at the Hotel de Crillon. Perhaps you may consider Les Ambassadeurs as an alternative.