Hi man... here in Argentina we don't know who will be doing opening act.
for your first question... if you like adventure.. a really nice place to visit is Bariloche and as you said January and February are peak tourism season, but if you will be having only 3 day, you can and you should hahaha go to "Cataratas del Iguazu", Iguazu Falls in english. You can take a look at [
www.welcomeargentina.com] is a really really nice place and there is a lot of adventure there
Enjoy our country and live Stones for ever
Regards, Ariel