I got somewhat bored of the Momentums and wanted something better so I got B&W P7 Wireless this week.
They sound excellent, much richer sound than the Momentums - going back to them I can hear how they sound muffled, no treble, mudded mids (in comparison, not saying they sound bad, I enjoyed them tremendously!)
They are much more bassy than the Momentums and much louder as well.
The negatives - they hiss when the DAC switches on, I'm going into a service centre on Monday to get a comparison and ascertain whether mine are bad or it's just common (it seems to be common though, since I'm not the only one complaining about it). It's maybe even worse than the ANC noise on the Momentums - at least with them it's always there so you get used to it, and it has its "purpose".
I posted a more in-depth comparison in the P7 thread if anyone is interested, but feel free to ask.
If anybody's looking for a worthy upgrade and you don't need ANC _that_ much, give them a try.