I use (and love) these too.
I have mine about 25cm from the back wall with the right speaker 80cm from the side wall. The left speaker is about 2 meters from the other.
In my room, which is about 14 X 15 foot and the bungs are not in.
I've read the review you're referring too, but some find the cm8's too bass light (not I) so it really comes down to the individual room and personal taste.
Speakers really do.need to be tried at home if you get a chance