Never understood how the treble was piercing. It's nothing like the hot treble on the Beyerdynamic T90. Maybe my ears just happen to be dull to the exact frequency where these spike. Like viralcow said, detailing could be better. Also, while I've only driven them with O2, Crack, and WA7, I don't think these scale quite as well with amps as some other headphones in the same price range. Even with the the WA7, these still lacked the detail compared to say the HE-500. Even though around the same price range, I truly believe the HE-500 is in a league above the HD700, mainly due to the scalability of amping. When run through the Emotiva MiniX speaker amp, the HE-500 really shines, and pretty much bests the HD700 in all categories other than soundstage. Then I added a tube preamp to the Emotiva (Quickie), and the soundstage is better as well. The HD700 was my first expensive headphone purchase, and I bought it at $1000 at the time. For the $2000 I spent on the HD700 and WA7, the HE-500 + Emotiva + Quickie could be had for about half the price, and it's a good 50% better. Really as much of a difference as when I went from HD598 to HD700. For me, this combo bested even the HD800 driven through Crack. Of course I have no doubt the HD800 would easily win when paired correctly with a totl amp, but the Crack is a well regarded amp for the HD800, so that says a lot. I have since sold both the HD700 and WA7. I think at the new price of $650, it's a fair price. I view it on par with the T90 for example. The HE-500 just happens to be a steal, though only if you know how to drive them properly. Most people drive them with normal headphone amps, and it doesn't sound too special. For example, I would say the HD700, T90, and HE-500 are all in the same league when driven through the WA7. But the scalability of the HE-500 is what makes it in my mind a league above the HD700 or T90.