First post 
25g vs 68g. I’ve had the 5K for years now.
Sounds great driving even moderately sensitive over-the-ears. Most recently for me the Ananda Stealth v3. Paired with a 0.5m balanced cable and it’s the ultimate putter around the house and yard with amazing sound. Recently retired with few obligations or worries.
iPhone 13 running Roon client. All sound processing done in 5K. I have a few tweaked EQ profiles I play with…XFeed is the best I’ve had including one of Jan Maier’s amps from 25 years ago.
Absolute best part is the lack of weight hanging from the HP.