Our good friends at Kotaku AU have offered their readers some insightful advice on beating the "You're not American or Japanese so you have to wait for everything cool" blues. In particular, importing Rock Band, the game that lets even your grandmother think that she can rock out all night, before finding some groupies for some post-show celebrations.
The guide is very basic, and won't point you exactly where to go for your purchases, it does break down what you'll need, when you can get it and what systems it will work for. If you can't wait for that feeling of euphoria you get after belting out a drum solo on
easy medium hard, this should be your first point of research.