Ichigo, welcome. My suggestion is to first go with the M22 mains, then the QS4 surrounds. Without surrounds you don't really have a home theater setup, while if your budget requires, you can temporarily do without a center speaker(the M22s would form a "phantom" center)and a sub. Although I now use my EP500 with my M22s at all times, before I got the EP500 I would often use the M22s without the much less capable sub I had at that time. The M22s have adequate bass for the enjoyment of most music, although adding a sub later is highly desirable.
