People put up with a lot more driving highs with certain speakers, but I want you to be aware that 66000 can be too much for me with the wrong amp. All Avalons with the ceramic or diamond tweeter, for instance, are more aggressive to my ear than the 66000. Kharma with the ceramics throughout. Thiels, which bother a lot of people, not just me.
67000, much easier even with the same amps.
67000, much easier even with the same amps.