Bipolars need plenty of room and sound best well into the room IMO, If you can't place them that way I would stay clear of that design. I'm not up on the new Definitive Tech. speakers but have listened to the old Mirage M1/M3's many times and thought they were great speakers if placed well into the room and away from side walls. As subaruguru stated..Try them first would be best.
Dave
Dave