Finally got my M-100s from the Amazon.ca deal. No hinge problems this time so I'm really happy. Seems to be a small paint finishing issue on one of the bands that hold the ear cups, but it's barely noticeable so I'm fine with it; definitely better than a faulty hinge at least. Now I'm just waiting on the XL pads.
My wallet hates Head-Fi. Got the Momentum, Amperior and M-100 within a month's span because of good deals lol.