Mountain Shoes to get the Aconcagua?

Hi to all. I am going to get the Aconcagua. I would like to buy the shoes "La Sportiva Nepal Evo Gtx" Someone tond me the La Sportiva Spantic should be better but most of the time I go under 5.000 mt when I hike. I don't want to buy somthing I'll use only once. Do you think that Nepal Evo with some good sox should be enough? Thanks to all