Not that anyone's waiting with bated breath, but I thought I'd update. I received the 7X, spent five days with them, and today they went back to Mitch for an adjustment. I'll pass on elaborating, except to say the sound was not at all what I expected, so much so that I have to assume something is amiss.
I just didn't want to promise to follow up with a review then disappear. Will provide an update when they're back.