Hi
It often depends from where you are starting from and what you want to believe, can believe and do believe 🤔

#1 DSP9,7200HCSE Upgrade,G65, DSP3200, HD621, Oppo 105D Audiocom Signature BDP, Sky Q, etc.
#2 Prime Headphone and Power Supply, Sennheiser 800.
#3 F80 Director, Panasonic TXP60ZT65, 210, Zen Mk111, Chord 8 Switch, Roon, Tidal, Explorer2, Apple iPad Pro 2nd gen.Chord M6 mains block.