Those look like some high powered amps there. I guess it's all in what you prefer.
I think the HE6 are bright-ish headphones yes, but in a different frequency range compared to the HD800 and to a lesser degree in its respective range.
With a good, clean (or synergistic) setup behind them, almost all headphones can sound good or atleast tolerable...to me anyways.

I think it shows in their frequency response graphs for the most part (check out InnerFidelity's). The HE6 are more energetic in the mid to upper treble, while the 800s moreso in the lower treble. That's how I hear it.
For me, the bigger difference is in bass quantity. The HE6 just have more, especially in the lowest octaves.

I think it shows in their frequency response graphs for the most part (check out InnerFidelity's). The HE6 are more energetic in the mid to upper treble, while the 800s moreso in the lower treble. That's how I hear it.
For me, the bigger difference is in bass quantity. The HE6 just have more, especially in the lowest octaves.
That's what I'm hearing so far. The bass is pretty different between the two but all the orthos I've heard have had very good bass esp low bass extension. I think the pairing of the HE6 with the Mjolnir is slightly ahead of the HD800 or it could just be the way the HE6 sounds but either way I now have two excellent headphones and an AD2k looking very neglected on my desk :)
Well Im officially part of the HD 800 Club, I just purchase a set with the included Amp, so i got the full set for my pc, so far I love the way they sound, I may have to sell some of my other headphones now lol. :)
I actually decided to take the pads off. I did it the difficult way by taking the pads off and then the "ring" off. Then I thought the ring needed to be put on the pads without realizing the new pair came with them already. I thought I broke it at that point since I couldn't figure out how to put the ring on the plastic part of the pads then I looked inside and saw the exact same part inside already. After you take it off you can just push it back in although it does take some effort since as one part clicks the other side seems to unclick so took a bit of effort but overall not too difficult. If you look at the pads as a D there are two "weak" points where they click. Those are where the top and bottom of the D form where it goes from straight to the curve of the D. The different is pretty major as my old pads should have been replaced a long time ago as they were flaking off.
I used this as reference: http://www.head-fi.org/t/503058/how-to-remove-hd800-ear-pads-finally-i-figured-how
No I have never found the HE-6 bright even with underpowered amps. In fact I have just bought a silver cable to brighten them up a bit. Works a treat 
So - are any of you guys running any aftermarket cables and are you noticing any difference?
Been pondering maybe a cardas or alo cable upgrade, or make my own with cardas or mogami.
The purpose would be to smooth out the highs a bit, and bring out the bottom end. If at all possible.
Any thoughts? 