It also depends greatly on how you have them set up and which models you are using. I have the Def Tech BP2000 (not made anymore, replaced by the 7001's), and I've had them in four houses over the last 10 years, so I've had to set them up in a lot of different type rooms, and how I've set them up has made all the difference in their sound. If you're using the bipolar models and can accommodate them being a good 2-3 feet from the back wall, they can sound fantastic with HT and 2 channel music. If you put them up tight against the wall, you aren't getting the sound you could from them. Slight toeing in of the mains also helps the imaging. Don't be fooled, bipolar speakers can still produce great "imaging". The largest floor standing models with internal subs have powerful subs; the medium sized models though need an external sub to get solid low bass performance.
Hope this helps,
Brad
