A:
This is a pretty detailed question in terms of multiple set up configurations that each have their own strengths and limitations.
5.1 audio passed through the televisions (except ARC connections) will be downgraded to a 2.1 audio signal, so while that's ideal for the audio bar, it may not be ideal for the 5.1 system. There are two audio systems in the configuration, and that compounds the explanation.
You may want to have a Geek Squad Agent connect your audio system for you - and while it may be an additional cost, it would be worth it so that he or she can walk you through the set-up and help you choose the audio system that you prefer.
We appreciate your support of Samsung products, but we just don't have a clear understanding of which audio system you intend to use - or how you intend to implement a DTS/5.1 signal.
--Mr.Samsung