I believe the law of diminishing returns kicks in realllly fast in terms of 'ultra high quality audio'. I have an external usb dac (Yamaha AG06), a pair of goo

I believe the law of diminishing returns kicks in realllly fast in terms of 'ultra high quality audio'. I have an external usb dac (Yamaha AG06), a pair of good studio grade monitors (Yamaha HS8's) and that's it for me. Exquisite listening quality without having to sell a kidney.