Amazon has discounted the Sony H900N headphones from $299 to just $248. That's not a huge price decrease, however this particular model almost never goes on sale, so it's a good time to pick up a pair. These are the Hi-Res Noise Cancelling pair, so it's definitely worth the price.
These headphones aren't quite on the level of the MDR-1000X or WH-1000X M2's, but pretty close. The main difference is that the H900N do Hi-Res audio, while the MDR-1000X and WH-1000X M2 do not. So you're getting some really crisp and clear audio out of the H900N, which is definitely going to sound good in your ear, but you also get some great noise cancellation here, which Sony has been really good with over the past few years. These do still have some pretty impressive battery life, compared to the WH-1000X M2's, it's sitting at 28 hours versus 30 hours on the other models. And that is with noise cancellation on, so if you turn that off, you'll get closer to 35 hours, which is still pretty impressive.
This is also eligible for Amazon Prime's free shipping. Which includes free two-day shipping, and pretty cheap next-day shipping if you need it here extra fast. If you are not an Amazon Prime member yet, you can sign up for a free trial of Amazon Prime by hitting the link below. You'll get 30 days free (if you're a student, you get 6 months), and then it's $99/year. Prime members do get a whole lot more than just free shipping though, so be sure to check out the full benefits.