I have my HeadRoom maxed out Desktop stack back, and I'm on my third pair of HD-800. Fuck, this combo is good. I have applied the "Frenchman" mod to this pair, and I think I'm going to undo it, as it actually sounds slightly dull up top. The maxed Desktop has such a grip on the phones, there is no sibilance or brightness on Air's Talkie Walkie, which is not exactly a dark album. I'm also hearing things I've never heard before, on this album, and I've heard this album at least a thousand times, on many different systems. The headstage is amazing, as is the slam and depth and richness. The Desktop stack hasn't worked when I've had a pair of HD-800, before, so this is a new experience. Damn. It's apparently "fixed fixed," now. I hope so.