The STEALTH headphones are way over my budget, but I'm intrigued by the technology and the sound.
Seeing the image of the headphones on the mannequin, I have a feeling that, on my head, they'd leave a gap at the bottom. I don't own any teardrop-shaped headphones, but I've experienced this problem with rectangular ones. As you and your partner found them a comfortable fit, I'm guessing that the STEALTH pads are soft and deep enough to fill the space around the jawbone.
I was pleasantly surprised to learn that you have lots of Bach's fugal music in your library. That adds an important data point in matching your audio evaluations with my expectations. I find that Bach's organ, keyboard, and instrumental music is a great test of acoustic frequencies, from rumbling organ bass notes to the complex harmonics of harpsichords. It's also an acid test of how clearly equipment separates contrapuntal lines.