Could you give any further impressions you had on the HD800S paired with the GS-X Mk2? Curious how fresh ears are interpreting this combination; i.e. too bright, enough body, etc...
Definitely not bright to my ears. The HD800S are not bright headphones and the GS-X Mk2 is dead flat, so it's a great combination. The HD800 is bright and on a flat amp, you will hear them for what they are...bright sounding headphones. In terms of "bloom", the GS-X Mk2 gives you what's on the recording; no more, no less. This makes for a very fast and transparent presentation. If you prefer a more coloured and warmer/methodical sound, then I'd suggest maybe a tube amplifier like the Woo Audio WA2. That said, I much prefer the GS-X Mk2 (owned the WA2, but still own the GS- MK2