Billheiser
Headphoneus Supremus
Love my HD650 and HD600 even my new HD598 are not bad.
But do I dare go up to the HD700 or HD800 will I get any better sound in doing so. I think the 650 and 600 and fantastic, never heard the 700 or 800
I also only use a Fiio E9 with the E7 or sometimes my E17 even use the D3 with the E9 from my mac for my 24 bit files and paired with the HD650 sounds great.
Really need to look into a tube amp to see what all the fuss is about, just wish I could get something good for $ 200.
The Vali is the best I know of, for under $200, that pairs well w the 700 & 800.