I ended up in a 10 by 12.5 foot room...it was ported or no ported cabinet?...I was getting a lot of boom...I ended up with atc 19...as yogiboy suggested that non ported cab does work well in smaller room...speakers are just under 6’ apart...have them 40" (front/tweeter) back...sitting 6’ back...about the same as youre given dimensions for youre room...I did get rid of first reflections because of axis is straight at me...that made a huge difference.
Just corner bass traps....did a all day set up on speakers and it really paid off...I do listen to same music pretty much...hard to go wrong with the handfull of English made standmounts available...