The OP might do well to checkout the new LS50 Wireless IIs and matching sub. $2500 plus sub -- don't know cost of sub -- could eliminate concern about matching electronics and speakers. Darko's review suggests KEF has done it well. It makes a neat looking setup that's ready for streaming and Roon. I'm going to try it for our living room.
Re crossovers: I was pleased with the result of raising a pair of Velodyne HGS-15s that supplement KEF Reference 1s from 40 to 80 Hz. I'd recommend OP try 80 Hz with the LS50s.
Re crossovers: I was pleased with the result of raising a pair of Velodyne HGS-15s that supplement KEF Reference 1s from 40 to 80 Hz. I'd recommend OP try 80 Hz with the LS50s.