If you look at pictures of most Plasma/LCD setups, it appears people place the speakers maybe a foot or so outside the TV. I think it would look a little strange to have the speaker seperated by 14-15 ft, if you only have a 46-50" Television, wouldn't it? I know it is not all about looks.
Downstairs my 80's are about 12ft apart, and they sound great anywhere from 1ft to 20ft back. I just figured for a TV scenario, you would still get great sound at 6-8ft apart, even 15ft back. Heck, my old boom box sounds great and the speakers are only 2ft apart.
