Oh I haven't updated my sig in a while. I've bought the HD800 on impulse because I got half my tuition back since I am doing part time in my last quarter. It is exactly what most people say it is. Very detailed, quite light in bass, and harsh trebles. I've tried different amps, GS1, my own, some OTL amps, and dare I say my portables (for fun) and they all exhibt the same harsh highs. Now people told me this and this amp will cure the highs. I said thanks but didn't listen to them because there is no "magical" amp that can cure something that is present in the headphones. These peak at a point where I find massive sibilance and no amp is going to change that. If it does that means the amp is flavoured and rolls off the top end which it should do with every headphone and thats not a good thing (plus the amps in question are over a grand and there is no sense is spending more money on an amp then headphones). A neutral amp is only going to amplify (BECAUSE THATS WHAT AN AMP DOES) the sibliance and not cure it.
I might as well use that money to find the perfect headphone which doesn't have these issues.