M60s and a sub!! I know I know, I read your post, you can't have both.

M60s go low enough in stereo but adding a sub go even lower and "fuller". My sub is relatively small but very "musical"

Axiom M60s, QS4s, VP100 Onkyo TX-SR804 Oppo 970HD Rotel RB-1080/RCD-1072 REL Q150E sub, PS 3