Sorry, I did not finish what I was trying to say. Yes, the amps inside the Krell, Pass, Bryston etc..are built like a tank ( they call it military grade sometimes) and the topology circuitry is top notch but they cost 5 to 6 K easily. The pain in the neck is almost every year, the manufactures jack up the price $300 to $ 500.00. If you want a big rig then that is the way to go.
As far as speakers, different folks, different strokes as they say. For forty some years, I have never owned nothing but Planar ribbons or Electrostatic speakers. Dynamic speakers are not for me even they may run 10 to 20K and certain people dream to own them.
What I am doing here is to set up a near field computer based listening system . For that particular application, the Adam Audio, Neuman, M-Audio fit my budget and my need. I do not expect these studio monitors for a large living room where they can produce a huge sound stage since that is not what they are designed for.At the same token, I am not going to stick a pair of full range Martin Logan or the Planar ribbon Apogee or the full range Magnepan into a 12X14 room and listen to them at low SPL, they will sound like crap, excuse my French.
You have the A7X, you are above par for a near field and mid field listening. I just finished set up another budget system and they sound darned good too. An Indeed T-amp ($86.00), an Onkyo CDP 7030 ( $170.00), and a pair of old Polk audio RT14I bookshelf pair ( $169.00 fifteen years ago) and I love them for what they can do and cannot do. System synergy is the key for each different application.
Happy NY to you. I am out of here . 'Til then happy listening and toying around with your gear.