dont waste your time anywhere else but Las Lenas Argentina. I spent a month there in september. Sickest terrain you will ever see in bounds or within a 45 min hike/skin.
The best terrain in all of SA, hands down. Look at the pics in my profile and you will get an idea.
for accom, check out
www.southamericaski.com, they know their shit and you can get accom as cheap as $100 per person per week if you like living in chinatown...(as the area of LL is called.)
plus its the easiest place to poach tix.