I have an LCD-2 and with the XLR connection to my Decware Taboo Mk III, Tabloo Mk IV and CSP3-25th anniversary I have used the stock cables, a cable I bought made with Cardas 4-24 wire, a Moon Audio Silver Dragon, and a set of ArcticCables made with UPOCC copper. I was using the Moon Audio most, really liking what it does to curtail the sort of slightly-veiled warmth of these headphones, but lost one channel for some reason. I then ordered the ArcticCable as I really am a fan of Ohno copper and boy, these are excellent cables. Just perfect tonal balance and no fatigue to the sound. As a result I ordered a cable from ArcticCables for my Sennheiser HD-800S and am experiencing similar sonic happiness.
The cable with Cardas wire is good. . . it has a slightly bigger, slightly less fast, perhaps more "classic" sound.
Since I moved the Taboo Mk IV from my main system and replaced it with the CSP3 25th Anniversary edition (as I'm using it also as a preamp for my Decwre SE84UFO3 25th Edition Monoblocks) I have been getting best results with the Sennheisers and their ArcticCables and will probably sell the LCD-2 so they will get use from someone and not just sit in a box. The Sennheisers and the CSP3 are a great combination (especially as I am using a Decware ZROCK2 to eq the system).