just got my EML 5U4G tube today, wow.. very nice, warm and full sounding with lots of depth and dimensionality. seems to pair very well with the HE-500 and HD 800 (the HD 800 sound extremely good right now).
i still prefer the 596 for the LCD-2 by a good margin though (that combo is scary good, the synergy is amazing, takes the LCD-2 to the next level and the couple people that i've recommended it to seem to just as impressed by it)
looking at trying 6DE7 and 6CY7 soon.
Edited by Dubstep Girl - 4/8/13 at 7:38pm