Presently thinking of upgrading my system - I have B&W DM601 S2 speakers which I'm relatively happy in terms of their neutral sound, with but am looking for speakers which: Aren't too critical of placement and respond well to being placed close to a wall and aren't really directional (would be great if the speakers evenly fill the room with sound). Have a better frequency response down to 40 Hz or so, and have more weighty bass. Are no larger than about 10" by 10" in terms of foot print as I only have an average sized living room (floor standing or bookshelf speakers are fine). Have a good sensitivity and are easy to drive. I don't have my music loud, so it's more about quality and richness of the sound at low volume levels which matters. Any ideas on what speakers might offer a noticable improvement?