Im getting ready to upgrade my HT and have a question concerning 6.1. The Denon 3808 im getting ready to purchase does DTS all the way thru DTS MA. My surround speaker cables are already set up like this config. in my ceiling. What will the middle surround back do for me? Thanks in advance..

http://www.dtsonline.com/media/2007/Speaker_61a.jpg

I use 6.1 and it's just makes for a nice fill in effect for many of the movies I watch. Not earth shattering, but works just fine for our needs.

It will anchor the rear, center image.