(Image credit: Future) In case you missed it, the other week Sony dropped its $649 1000X THE COLLEXION headphones . But don’t worry, I’ll spare you the shouty caps and just refer to them as “1000X The Collexion” or simply “1000X” from now on. An upgrade to the still fairly recent Sony WH1000-XM6 , the 1000X have stolen the XM6’s accolade of being Sony’s flagship over-ears. And naturally, that demands a premium in price. The 1000X will set you back $649. So, some dollars indeed. Sony sent us a few pairs to try out, and I’ve gotta say, they’re fairly impressive. As it happens, though, when the 1000X landed on my desk, I had at hand my daily drivers — which I think are the Sony headphones’ closest competitors: the Bowers & Wilkins Px8 S2 . Naturally, then, I did a little back-to-back test to see which came out on top. Here’s what happened. But first, a note on price Bowers & Wilkins Px8 S2 in blue.…