The two headphones in question visit my article here on head fi to get some background for the work done to each headphone. including the overall price paid for each.
Featured here is my desktop as I write my reviews, on the right is FooBar 2000, with the 7 songs I use to test each song. I don't use eq during any testing which is why as you may noticed the eq tick box is unchecked, in addition it's nice to have the spectral graphs running to help me identify the particulars of each song and headphone, aside from that is just the folder layout for fooBar 2000. I like the editor that's in Blooger, but I do make copies from these articles to word documents I keep offline as well.
So in conclusion with a total score of 4 in favor of the dynaW1000x, I'm going to keep them both
The LA D2k- Has an overall balanced sound, slightly withdrawn but full bodied central and lower mids, with a very powerful and taught Sub and Mid bass, with a smooth top end and slightly aggressive upper mids. The overall tone is very clean, but with a touch of warmth due the some what forward bass and full bodied nature of the mids. The sound stage has great width and average depth and instrument separation.
Where as the dynaW1000x- also has a balanced sound, with much more forward and intimate mids, but an overall drier sound. Bass has good attack, but a little light bodied. The mids tones are more organic or sweet sounding, but also more aggressive with a lot less decay. The sound stage is a touch narrow, but is vastly deep and very well separated.