I heard that the HD800 is picky when it comes to amps. Does this make a real, make-or-break difference, or is it mostly just slight refinements/placebo effect (like paying 500 dollars to replace crappy 7N copper cables with L33T 8N copper)
If it really is that picky, will the fiio e17/e09k work well with it?
Also, I mostly listen to progressive metal, symphonic, and electronic stuff, all with very impactful (not bassgasm, just exciting) parts.
All lossless or MP3@320.