If you end up deciding to get new speakers, I would recommend you listen to the KEF LS-50s and the Gallo Stradas. Both of these are exceptionally good monitors and are time coherent. The Gallos also offer the benefit of being a crossover-less design, which makes them phase coherent as well.
Either of these speakers mated to a good sub with DSP control, like a Velodyne DD-10, would provide for an awesome listening experience in that room...
Either of these speakers mated to a good sub with DSP control, like a Velodyne DD-10, would provide for an awesome listening experience in that room...