The Salk SongTower (I own a pair) and Klipsch RF7 (haven't heard it) are likely to be very different sounding speakers. I'd strongly advise you to listen to each before buying.
SongTowers have deep but un-exaggerated bass, and an overall balanced and neutral sound. See my owner's review (linked in my signature below). They also have very wide dispersion leading to very good imaging.
Judging by the frequency response curve below, I'd guess the RF7s have exaggerated bass, a broad recessed response across the mid range, and a rising treble above 2,000 Hz. Their off-axis response falls rapidly at 300 Hz and higher (compare 60° off-axis above and below). They beam sound, the opposite of wide dispersion.