Alvear Palace of Buenos Aires

Did you try at the Alvear Palace, on 1891 Avenida Alvear? it's really classy, with Louis XVIth style furniture brought directly from France. They also have a roof garden and a restaurant serving French traditionals - La Bourbogne, that's the name if I remember well. Last year it was damn expensive, 410$ for a double room, with some more 100$ if you feel like having dinner at La Bourbogne. But if you can afford it, why not?