I am looking to help my uncle set up a relatively inexpensive sound system (~$2000 for speakers and reciever) for his new HDTV. His room is 12'x28.' I was wondering if Dipoles or Bipoles on the side walls would be a good option for a room like this. Or would direct radiating surrounds on the back walls be a better fit for this long room? What about tripoles on the back walls? Any suggestions would be greatly appreciated. Thanks!