You know what I haven't done in a while, guys? Poking a wasps nest just to see what happens.
My honest and completely serious position:
In a headphone rig of ANY grade and size, the two
by far most crucially important components are the DAC and the headphones.
A good EQ comes in at a distant second.
A well-performing, whisper-quiet headphone amp comes third.
Don't skimp on interconnects, but they come in last.
Forget about "clean" power, that's only really worth talking about in larger two channel setups.
Discuss, while I'll be watching from a safe distance.