I'm picking up a Harmon HK3480 and will attach a pair of Rti6's to be used as a small home office bookshelf system (10 x 11). Listening volume will be at moderate or low playing mp3's from an iPod or feed from my PC's soundcard. I rip my CD's between 192 and 320 bit. System will only be used for 2 channel music listening - no home theatre/movie/surround sound setup desired. Type of music played: Diana Krall, Sarah Brightman, Armik, Eagles, etc.
What would you all recommend in a small sub or will the RTi6's be plenty of bass? Budget is $400 or less. I'm leaning towards Hsu's STF-1 but have not heard it. Is the Polk PSW10 enough? I'm interested in picking up the lows. No rumbling, knock me out my chair bass needed.