Easy. The GoldenEar Triton 2 Towers
. Their dynamics are helped mightily by built-in passive radiator-augmented subwoofers powered internally by 1500w amps. Up top is an MTM array anchored by a folded ribbon tweeter (much like a Heil AMT).
List price is $3K, in your price range. The midranges of the MTM array are particularly fast, responding out to 20KHz. All reviews
I've read (and I've also heard the speakers) marvel at the seamless integration between the cone midranges and the very fast ribbon tweeter.
The powered woofers provide real bass down into the 20's. The speakers have a rounded trapezoidal footprint making for a 7" wide baffle. Imaging and soundstage are first rate. Narrow baffles provide for better room-filling dispersion and a minimum of multiple reflections from the front baffle.
I've heard these and they are very cannily conceived. The company was founded by and speakers designed by a team that was involved with the founding and design of Polk and Definitive Technology.
Because the heavy lifting (the bass) is done by internal amps, the speakers only need a mid-powered amp to sing. Co-founder Sandy Gross uses a SET amp on his personal pair. They would absolutely rip powered by a Rogue Cronus Magnum.