I own a pair of M3's that I run full range without a sub in a second system. Having no sub is positively the most neighbor friendly option. Given your musical tastes, however, you may feel your missing too much "meat" without a sub. These speakers excel at everything they attempt to reproduce. They don't attempt low bass. I have grown accustomed to the way they present music. I don't feel the need to add a subwoofer. The difference could be in Home Theater. If you are at all into sound effect type movies, low bass is a must. My advice is try the M3's full range. Give yourself some time (at least a couple weeks of serious listening) to get used to the way they sound. Then decide if you want to add a subwoofer.
