I just bought myself a pair of Sennheiser Momentum 2.0s today, just the regular wired version (I'm not into Bluetooth)
My thoughts (coming from a Shure SRH-840, which I love to bits):
* Build quality is SUPERB!!! It's built like a tank and I can see it lasting for a long time.
* Comfort is also amazing, the leather smells and feels amazing on my ears and the ear cups fit nicely in there (I have pretty big ears).
* The soundstage is really nice and wide for a closed can, a little wider than my SRH-840s, just by a pinch
* The sound is very inviting and fun but still balanced. These are headphones that scream TURN ME UP!!!
* Bass: Very present and great fun, it seems to extend really low because I'm hearing things I've never heard in songs. The bass response for me is just flawless.
* Mids: Gorgeous Sennheiser mids (much like Shures). Really nice and forward, vocals sit right in the front row, no distant recessed mids here my friends.
* Highs: Really smooth but a little less sparkly than I normally like. I find the treble a little on the dull side (I know some people like the word warm, but I use the word dull here, hehehe). However, with just a pinch of EQ at 15 - 16 kHz giving a boost of around 3db really brings these headphones to life. I'm using Boom on Mac, and just boost the 16kHz band 3db and am in heaven instantly.
When A/Bing with the Shures (and including this EQ adjustment on the Sennheisers), I find myself coming back to the Senns most of the time due to their fun and likely bass response and general involving sound. I also LOVE the fact that the iOS remote controls music playback on my Mac too (didn't realise that would work, WOW).
I have truly tried a LOT of closed headphones including the Oppo PM-3s. I think that these strike the right balance of build quality, price and sound quality for portable use. I was one step away from buying the Oppos yesterday and I'm glad I didn't because these cost me $150 less and to me, sound much more enjoyable than the more analytical signature and narrow soundstage provided by the PM-3s.
I would love it if Sennheiser would give us some more sparkle in the next revision, but all in all, i am really happy with my purchase
Cheers
zambz