Q series was designed for home theater, ST was designed for music. I've never heard a Q series, but I own a strata. I gather the Q produced greater quantity of bass, where the ST produced greater quality.
I like the strata 3 for music, but I can imagine it would be a bit lacking in grunt for HT applications.
I like the strata 3 for music, but I can imagine it would be a bit lacking in grunt for HT applications.