Room Issues

Hi I live in a 2400 square foot modern glass and concrete single roomed loft (think IKEA), with high ceilings. The back and side wall are glass, and because of WAF, sound treatment or drapes are out. I had a pair of ML Quests that never sounded right, even after I added Tact preamp/amp/room equalizer and rolled off the top. I was thinking that either I should give up on bass and listen to a nearfield small monitor, or eliminate the back/sidewave issue by going to a directional speaker like Tannoy or even klipsch LaScalas.
I listen to classical music of all types.
Suggestions?