I would go back to Taillevent. But if that wasnt in the cards I would go to Pierre Gagnaire in a heartbeat. Read the Michelin guide about them as well as some of the stuff Patricia Wells has written about them. I think food wise it stands above Taillevent or any of the places in NYC (Le Bernardin, Daniel, John George, Ducasse). I prefer the service and atmosphere a little at Taillevent which is why I would give them the nod. But food wise I think Gagnaire is really tough to top.