I read this entire thread over the last few days. I have the AD900's, and I always thought that these have a very nice amount of low end. But yes, the AD700's are a little bass deficient in comparison.
I know this has been mentioned by some, but now my brain is mush with all that I've read. But has anyone directly compared the AD900 to the AD900x, and how do they sound the same or different? I'm a little nervous that if too many people say that the AD900x have more bass than the AD900's, that I won't like them, because I really don't think the AD900's need any help in that regard.