After some months with B&W P7W I have to say I am more and more impressed. Probably my ears got used to the sound and now start to navigate more into the unknown of these great headphones' signature. Mids pop out more, electric guitars have more power especially; bass is less prominent.
Still, I remember when I went to shop and tried all the other wireless options in this price range.
Momentums were showing strange distorted instruments here and there, probably because of always-on noise cancelling. They where unbearable for my ears, and sounded also simple, no soundstage and no life. Cheap looks and weight.
Sony MDR1000x - well, it sounded maybe better but no bass, literally; also lots of fuss with many settings that are useless. Treble was totally distorted, couldn't bear it; put some old school Tiesto trance or black metal and you are dead.
B&O H7. H8, H9. - I went especially to a Bang and Olufsen shop to try these. Construction and design felt of higher quality than Senns of Sony. Put them on, and for sure they had more mids with greater depth and detail. But the treble, what was that? Fully muffled. Probably they need burn-in or those were bad? Anyway, let the shop unimpressed for the price, all the models have this same signature where treble was muffled.
Another model that I do not see on many forums:
Bose Soundlink 2 wireless - I listened to them by mistake in a shop just to see how they sound compared to muffled problematic bose qc35. Wow. Definitely these are the best wireless headphones I tried at around 200 dollars/euro. Maybe I wouldn't even go for the P7W if I knew. Compare to P7W, they lack some bass but the rest of the sound range is immaculate, construction quality is just ok and design is me.
About the P7W - try to put a thin cloth between speaker and the pad on each side. It makes them sound a bit more airy and less bassy. Make it really thin so that the pad does not move and the plastic pieces that hold the pads don't break(see image).
I was debating between getting the H8 initially before I chanced on the P7 being offered to me as well. with no hesitation, I quickly jumped the gun on the P7 eventhough the H8 has wireless function. the H8 is nice depending on what genre it is made for, but overall, the P7 is mostly an all-arounder. also, loved it's signature better than the H8. if someone is looking for a balanced headphone, there are some cheaper options out there, but personally, that is not what I'm looking for.