So I sent the Stax SR-407 off to the next person and plugged in my HE-400 again. I have to say, I'm basically blown away every time I listen to something else and come back to the HE-400. I have a different kind of upgradeitis this time. I don't feel that I need it because I love the HE-400 so much, but I can casually save up a little bit on the side because I do plan on getting a Stax system after hearing the SR-407. The clarity is just .. through the roof. Obviously everything in this price range is iterative but they have such a wider range than I expected.
Until then, happy to be back.