dcc2/cdsd owners: how much acoustic dampening?

I finally have the dcc2/cdsd combo and was wondering how tricked out is the acoustical setup that people have. I have a limitation in that I do not have a dedicated listening room so instead just the old living room. My living room has cathederal ceilings (which I have acoustically padded) and hard wood floors (but plenty of rugs). I am debating whether to also apply acoustical fiberglass and fabric to the front wall to dampen the room further. I am debating whether to do the front wall with two large panels (acoustical fiberglass and fabric) spaced apart (from 4 feet up to near the top which is close to 20 feet). The side walls are not an option nor is carpeting the floors. I could also do the back wall?

I am running the emmlabs combo with wilson watt puppy 7's and rowland 302 amp.

The sound currently has amazing bottom end and vocals are very nice and clear and sound natural.

A friend is a musician who has a home studio and listening to some miles davis (cd kind of blue) in his system and studio which is acoustically very dampened and noticed more activity and detail in the midrange. He has in his studio pass labs amp and small speakers with subwoofer with crossover.

Anyway so the big question is how much to dampen the room? Anyone do a little too much and then pull back? Anyone do a little and then decide they needed more?

Michael