I lived with the Revel Performa F30s for 3 years. While I would not describe them as smooth and laid back, they are certainly not forward sounding or bright, either. I can't help but think that a room as large as yours with vaulted ceilings is an echo chamber with significant reflections resulting in your bright sound. Have you tried nearfield listening? Make sure the speakers are well away from the sidewalls. Last, in my experience, Krell can be bright/forward sounding. I am not familiar with the rest of your components.
Scott
Scott