I know this thread doesn't have much activity lately, but I wanted to update that I bought a factory sealed X2 from Amazon UK in early 09/17 (bought and sold by Amazon). I paid $150 shipped to the US, which I thought was a killer deal.
I've read through this thread and a large portion of the big X2 thread.
I've carefully looked over my X2s, as well as completely taken them apart, and there are none of the issues that have been discussed. The box and headband both say Gibson. The pads are 100% not glued whatsoever, no dye come off the pads when rubbed on white paper, the pads are the same foam density, and the aluminum trim ring is literally perfect. The sound is also spot on. The box has the high-res logo, so based on the information I've read, the version I received is the most current version.
It appears that Philips/Gibson finally got their act together with the manufacturing of these. It could be that they retooled some stuff or revised their manufacturing process for the X2HD (to address the previous issues), and the regular X2 benefited. Who knows, but I couldn't be happier.
Yeah yeah, I only have a sample size of 1, and I don't have an old Woox pair to compare (yet). But the sound signature is spot on what people describe. No muddy or bloated bass, no bleeding into the mids, none of that stuff that has been attributed to many of the Gibsons.