I have a Silver Dragon for my UE-10's and my JH-13's, but I ordered a TWag from Whiplash for my HE-6's (60+"). During the Fall NYC regional meet. Ray stayed over my house and I listened to a balanced cable that he made for the HE-6 for the SR-71B and was amazed by the sound quality. I am hoping that the TWag will come close to what I heard.
I would never use the HE-6's outside (too much ambient noise), but when I don't want to use my speaker amp, it will be a nice alternative.