Apologies for mentioning this product outside your price limit, but if you can stretch to $8,900, the highly efficient 100dB/W/m "Volti Audio Rival" may be a good fit for you:
From Stereophile Ken Micallef review:
the Rivals had no "sound" of their own...immaculate transparency...
bass was "riveting, powerful, and forceful, and as full of tone, texture, and energy, as I've ever heard," and that the high frequencies were "smooth, wide open, and grain-free."
other reviews also very favorable.