If you are ever in Buenos Aires, it is well worth it to hop on a flight (35 minutes or so) across the river to Uruguay. Montevideo is a cool city, and the food (very similar to Argentina) and sights are great. I passed this course several times when I was traveling for work, but never did play in Uruguay. As Greg alludes to, the real spot is Punta del Este in Dec-Jan. it is sort of like an awesome mix of the Hamptons and Miami Beach, but with more (quantity and quality) beautiful women. As for golf, within an hour of BA there are some pretty good courses, such as Olivos and Jockey Club.