
AVRat
Audioholic Ninja
You might consider using in-walls in the columns to minimize depth/impact of columns into the room. Another option is to use an acoustically transparent screen with the center behind it.
http://www.smxscreen.com/
http://www.seymourav.com
For less than $2100
SpeakerCraft AIM LCR 3 x 3 (Front 3 soundstage) http://www.audiophileliquidator.net/product_info.php?manufacturers_id=51&products_id=240
SpeakerCraft AIM Cinema Dipole Three x 2 (Side surrounds) http://www.audiophileliquidator.net/product_info.php?manufacturers_id=51&products_id=3768
SpeakerCraft AIM7 MT Three pr. (Rear surrounds) http://www.audiophileliquidator.net/product_info.php?manufacturers_id=51&products_id=288
http://www.smxscreen.com/
http://www.seymourav.com
For less than $2100
SpeakerCraft AIM LCR 3 x 3 (Front 3 soundstage) http://www.audiophileliquidator.net/product_info.php?manufacturers_id=51&products_id=240
SpeakerCraft AIM Cinema Dipole Three x 2 (Side surrounds) http://www.audiophileliquidator.net/product_info.php?manufacturers_id=51&products_id=3768
SpeakerCraft AIM7 MT Three pr. (Rear surrounds) http://www.audiophileliquidator.net/product_info.php?manufacturers_id=51&products_id=288