Tough call. I think the LCD-X is the better headphone because every music genre sounds great out of it, including classical. The HD800 is wonderful with classical and the soundstage is unbeatable, but they require a warm source/amp, are picky to drive, and can be hit or miss with music other than classical. I have both, I love both, I switch between one and the other. With bright recordings (e.g., anything by Deutsche Grammophone, for instance, specially those nasty-sounding, dry, treble-fierce Karajan recordings), I would always pick the LCD-X over the HD-800...here that Audeze warmth wins the day and makes the recordings sound bearable, since the Xs are more forgiving. With wonderful-sounding recordings, the choice is less clear and I'll call it a tie; but if it's huge soundstage for huge orchestral works what you are looking for, then the HD800 is your man; if you like more euphony and caresses to your ears, then LCD-X is it. Tough choice...it's great to have both in my headphone stable. The best two pairs of headphones I've ever heard, although the LCD-XC and T1s are definitely not far behind.
Edited by figaro69 - 1/14/14 at 6:41pm