I actually use two accounts. To me it's the easiest because you can easily switch back and forth (it's literally selecting which account you want to use from the menu on the fly) in the play store and then you have access to apps in the US market and the Arg market. So you can access official apps from the store without sideloading the apk from a sketch site. Both market apps will work on your phone simultaneously.
This also works great for the NFL international app that is not available in North America.