I just joined the Axiom "family" and need some advice. I am not an audiophile but just purchased M3's and a VP100 to start my H/T system (man, they are awesome!) and am now looking for a decent subwoofer. Is there any significant difference between a down-firing sub vs. a front-firing one? My system will be used 80% for movies and 20% for music, and the music will primarily be jazz-related. Any advice is welcome to help me in my search. Thanks.