I second the Coda suggestion. I'm a big Coda booster--I think they deserve more love than they get--and I think the CSX would deliver plenty of grunt in the bottom, yet give you transparent and sweet mids and highs.
BUT I also agree with Nonoise that, if you haven't already, you should possibly explore room treatments. It's amazing what the right treatment in the right spot can do to tame brightness and another anomalies.
BUT I also agree with Nonoise that, if you haven't already, you should possibly explore room treatments. It's amazing what the right treatment in the right spot can do to tame brightness and another anomalies.