I had a lot of fun at this meet. A lot of talking and not a lot of listening. I only accomplished a couple of things as far as listening. The lcd2 seem to be more song dependent more than rig dependent. If the vocal was recorded upfront (in your face) on the cd rather than set back a little bit, the lcd2 come across really aggressive and harsh. Norah Jones Come flyaway with me was brutal. The highs are a bit rolled off. I noticed this on a couple of songs that have a high hat or cymbal that is very soft in the background that was almost not hearable. After listening to the thunderpants and the lcd2, it seems that both seem to move vocals more toward the front of the soundstage which is great in some music, but not enjoyable in others for me.
For me, I've noticed that certain DACs paired with the Stacker II can make a difference in how aggressive the presentation is with different recordings. The Assemblage->Stacker is more forgiving, while not sacrificing too much of the the detail and separation, but I definitely noticed differences in the recording/mixing between albums when I was borrowing Gil's DAC. I think given how precise your rig is, the recording and/or mixing may make a bigger difference than on my gear, which is built more around tonal quality. The highs can be a bit rolled off, depending on taste. I can totally agree with that after my time with the headphones. I might go so far as to say the LCD-2's are pretty transparent and can (but maybe not always) reveal differences in the chain, from recording to source to the rest of the gear.
Oh...didn't mention it before, but I liked the PS1000 out of the Music Hall 25.2 DAC. I put them on and thought I wasn't listening to Grados...there was some real nice bass that wasn't too sloppy and things weren't THAT forward. Of course, then I switched to the LCD-2 on that DAC and I felt the presentation on the latter headphone became more laid-back. Heh.