There’s not a passive crossover that can do what DSP crossovers can no matter the price. One of the most fascinating speakers around and I would love to hear it is the Genelec W371a. Paired with the 8351b’s or 8361a using GLM 4.2 calibration. Not to mention a complete immersive system. If money was no object this is world class.
https://www.genelec.com/immersive-hub