I am planning on purchasing a Japanese Xbox soon to buy some region exclusive games. Right now I live in the USA and in multiplayer games I'd still like to be paired with other Americans rather than Japanese. I heard something about the 'Initial Setup' where you can select the region of your console. So my question is, if during the Initial Setup (I assume this can be changed anytime?) I set the country to USA will the games pair me with other Americans even though I'm playing on a Japanese Xbox, with a Japanese tag, and a Japanese version of the game?
An unrelated question I had: are the Xbox Live subscription cards region-free?