Arb,
I've traveled through about every country in Latin America as I had this huge urge to learn spanish and portuguese.
The women of Argentina are clearly the most beautiful in south america and the world for that matter. There's a place in urugary called Punta del este. It's a place where the RICH argentina people vacaction. Go there and you'll see the hottest classic and stuck up women period.
And not only physically are the women beautiful, it's also the way they present themselves, very classy, and not to mention they have the most beautful accent, the italian sounding spanish.
However, one of the things I've found is that "pulling ass" in Buenos Aires is not one of the easiest things. If you approach women in BA and talk spanish w/ an american accent, so they know your american, they'll still put up with wall, like the classic american girl. I've found that it's very country dependent when considering how easy it is to pull ass and to use the "American card"
Also, the people of BA do not really have the latin american hospitality, they're european, and arrogant as the stigma says.
My favorite place hands down in latin america was costa rica. Stable, beautiful, and the people are just plain friendly & nice. Very are very attractive, although nothing compared to women in BA, but they do have that latin american hospitality.
Another place you might want to check out is Brazil, women are ugly as hell and no one speaks english or spanish... so you really have to learn a bit of portuguese, but it's easy and I mean very easy to learn if you know spanish. The people are the ones that make that country, the place is viberant, rich, and energetic. It was a great experience