Austin Morrow
Headphoneus Supremus
Not sure if this is totally high end, but the sound I get off of both the HD650's and the PS1000's is as good as it gets.
I'm usually using the UDAC - PSU - BUDA - Whiplash Audio TWag V2 - HD650 & PS1000

I'm usually using the UDAC - PSU - BUDA - Whiplash Audio TWag V2 - HD650 & PS1000