I have always used 2 channel for watching movies and TV and would like to get into multi channel. I just bought a Onkyo 705 7.1. I watch movies by my self or with my girlfriend. So I am always in the sweet spot and no one else is sitting outside of the sweet spot. I have done a great job in placement with my NHT speakers and TV. When watching news shows or movies with just dialog it seems as though the TV is a speaker itself and I can not tell the speakers are even working until other sound effects begin playing. So do I need a center channel? I would like to spend the money I would have used on a center, on a sub instead. Can my Onkyo play 4.1? and if so will there be any loss without the center?