@sammyshaps -- great description of what you're looking for. Given that, I think you'll be very pleased with the Hegel. It will certainly tame the highs a bit while adding more heft and meat on the bones in the mids and bass. I think you'll also find the soundstage will expand in all directions and elements within the soundstage will more solidly and believably occupy their own space within the stage.
The M6si might work too, but I'd be less confident recommending it over the Hegel. Read some reviews and see which one more reflects what you're looking for if you haven't already. I think the MA6500 will roll off the highs to much given what you're used to, but I could be wrong. Again, best of luck.
The M6si might work too, but I'd be less confident recommending it over the Hegel. Read some reviews and see which one more reflects what you're looking for if you haven't already. I think the MA6500 will roll off the highs to much given what you're used to, but I could be wrong. Again, best of luck.