I concur with folkfreak. If you are prepared to adjust your listening position to the optimal spot in the room as opposed to trying to optimize your speaker position for your preferred place to sit, then you are on your way.
My room is similarly sized, though with carpet over concrete, but was still a bit ringy and had to be deadened. The sweet spot for me is very small, and in an awkward spot in the room, but 98% of my listening is done solo so who cares.
My room is similarly sized, though with carpet over concrete, but was still a bit ringy and had to be deadened. The sweet spot for me is very small, and in an awkward spot in the room, but 98% of my listening is done solo so who cares.