Personally these are my favorite with my LD MK IV SE: http://www.ebay.com/itm/NOS-TELEFUNKEN-6AK5-5654-6AK5W-Tubes-for-Little-Dot-headphone-amp-MK-IV-3-4-/290678560214
Holy SHYTE! $40 for a single driver tube? Do they come with a Sports Illustrated Swimsuite Edition cover model?
On the topic of appreciating my MKIVse...
...a year or so ago I decided to take the plunge into electrostats. I bought some Stax and a Woo Wee and using a small power amp that I got for only the cost of shipping from a generous Head-Fier I was on my way.
I hooked everything up and started a favorite track. It sounded like garbage. There was some horrible noise coming from the amp. I remembered that the Little Dot could also pull double duty as a pre-amp. I scrounged up a second pair of interconnects and have not looked back since.
My current rig (for over a year) Denon DVD-2900 -> Little Dot MKIVse ->Sonic Impact Super T-amp -> Woo Wee -> Stax SR404
I still keep my dynamics but compared the the stats they just sound dull and boring. Kinda sucks really lol cause I loved my HD580's.
Edited by cswann1 - 1/17/13 at 4:44pm