There is an intriguing coffee table guidebook out called CHILE-ARGENTINA: Handbook of Ski Mountaineering in the Andes. Browsing through the book's website certainly whet my appetite. I urge you to take a look at the interactive map, and see what you think ... Decent weather, reasonable approaches, August on skis instead of the beach, and easy acclimatization.
CLICK HERE TO ACCESS THE INTERACTIVE MAP.