Got my LCD 3 today, been listening to it for couple of hours.
My frequency response graph basically tells the right sort of sound I am hearing. I only have LCD 2 rev.1 to compare（since I didn't like rev.2's sound).
It is what it is, better than LCD 2 in every way for sure, but like people said: does it worth twice the price? No. But I am very happy to live with the improvement it has because it's really just that last a few inches there for absolute audiophile sound.
MacedonianHero was right, anything that can drive LCD 2 well can drive LCD 3 too.
The major difference I can hear is the more extended treble and more importantly more linear and smoother. I always find LCD 2 rev.1 has a slightly more emphasized upper treble and a dip around 8-11 k which can misplace the instruments sometimes. With LCD 3, I can definitely hear more air around that region which leads to a better imaging with opener space. So the detail can be slightly easier to be heard, upper treble of LCD 3 gives a more liquid, relaxed sounding which make the whole treble part more coherent with mids. But I don't hear the more distant vocal that people are talking about despite the lifted mid-treble. The mids is still extremely neutral to my ears.
I am not fully hearing the best bass so far, probably due to the amp I am using. It hasn't provided the best impact for me yet.
Probably I have sensitive ears, I don't find LCD 3 dark at all. I don't see why some people still call it dark. IMO this is probably the most accurate sounding I can hear from music (also I like to listen to music with fairly large volume). Sure there is cut around 8k, but the forever extended treble makes it up with amazing transparency. It's all about balancing the spectrum. The headphones have larger space and more airiness have to sacrifice some ultra treble extension to make it sound smooth enough, otherwise it will sounds really High-fi (Harsh IMO).
Anyway, will update later. I am pretty happy so far.
I will definitely go for a warmer amp (with more lows) after I heard LCD 3.
Edited by tupac0306 - 2/21/13 at 9:52am