What are you hearing that makes you think that you need room treatment? Given the size of your room, I'd be surprised if you had first-reflection problems. Generally two-channel speakers should be well away from the end walls.
If you could post a Virtual System for us to see it would really help us get specific. Also you need to tell us what's sounding bad in what way. We're shooting in the dark right now.
Given the large room, well stuffed couch, carpeting and high ceilings I'd guess that almost any problem would be related to fine tuning the speaker placement rather than changing the room. Oh, yeah, what speakers do you have?
Dave
If you could post a Virtual System for us to see it would really help us get specific. Also you need to tell us what's sounding bad in what way. We're shooting in the dark right now.
Given the large room, well stuffed couch, carpeting and high ceilings I'd guess that almost any problem would be related to fine tuning the speaker placement rather than changing the room. Oh, yeah, what speakers do you have?
Dave