Save yourself some money by going on a different path: less known brands that are offering amazing products for fair prices. Most of them are class D, like Class D Audio, Ghent audio and Temple Audio (I just bought the monoblocks from Temple Audio, soon will post a review).
Or the small, cheap and extremely fantastic KingKo Audio, a tube integrated amplifier that is also a headphone amplifier.
If you want to go boldly I can sell you my Line Magnetic 219ia for much less than 6k. And this is a musical beast! Just check all the reviews. (just too big and heavy for my back and my room, that’s why I go smaller from now on).