Fantastic gear you´ve got there.
No doubt I would be listening to music all day long with such one. Imagine with two (! ! !)
About the World Cup, my personal opinion
, going to Rio on another date may give you a much better experience. Its a very nice city.
I wouldn´t go there at the world cup. Unless you like crowded environments (everywhere, including airport, bus staions, hotels, tourist attractions and so on... Consider also pricing of everything which shall rise like hell...).