Yes, we are all a bit nuts for sure
If you get an OTC tube amp, power shouldn't be an issue with the HEKS. OTL amps aren't quite as suited for planar's.
I know both Eufonika and McChanson can make OTC does you if you as, I got a quote on one from Eufonika myself. Tor Audio, Cyain and I also believe Woo Audio all make OTC amps as well, so there are plenty to choose from, in many price ranges. So you don't have to spend a lot, if you just want to see what the tube world has to offer.
I quite like it for the HEKS, tones down just a tad of the top end and adds some warmth ro the midrange, which suits them a lot IMO.