Hey guys,
So grabbed an H9I from my local B&O. Here's my two second, blunt feedback - will likely report back after my Asian travels throughout the month of Feb. Remember, this is my feedback - 100% your mileage may vary. All 'tests' are in wireless mode (my main use).
H9:
I owned these for about a year. Loved them but started looking for more sparkle in the mids/uppers. Very comfortable, fell asleep with them on multiple occasions (plane travels). Great build quality. Great support from B&O (like seriously, wow). ANC is exactly what I want - not a a cocoon but quiet.
QC35:
A thinner sound - just felt like something was missing. A nice sound, just didn't hit the songs with enough punch (guess I'm a basshead?). Impressively comfortable. ANC gave me an off feeling.
PX:
Burn these in - seriously. Impressive ranges - great depth, sparkling trebles, sci fi soundstage. NEEDS high quality music - not a forgiving headset. Comfort was a concern for me. I couldn't pin it on one thing, more a combination of the weight and the clamping force. ANC is fine, it effects the sound, but use it at it's lightest setting and you'll be groovy.
WH1000XM2:
Really like the sound from these. It's wide, plays it safe, with a slightly boosted lower register. They are not fatiguing at all and I bet most would be happy if they bought these and never looked back. Touch/gestures/whatever works - it's not perfect but it works - I'm here to listen to the music, not slap the one cup every four seconds. Comfort was on par to QC35 for me. ANC would probably be titled as 'best' except it gave me an off feeling like the QC35s.
H9I:
Much brighter than the H9 but similar depths. Nice and wide sound, trebles sparkle but might be sibilant for some. Mids are much more prominent. These have my favourite lower register out of all of these headphones - they're very present but not bloated. ANC removes outside sounds better than the H9 but adds a little bit of pressure. Audio quality is narrowed slightly with ANC on but it's still very pleasant. Bad note - they dropped aptX. Now, when Oreo (Android 8.0) comes out all of the mid to high tier Android phones will just utilize AAC but it's food for thought (I happen to have a phone that supports AAC already). Comfort is great, similar to the H9 but feels lighter. The lack of a hard case is a joke at the $599.99 CAD but overall build quality is lovely.
Summary:
I don't know. I prefer the H9I but I imagine everyone will have a different pick for a different reason. Most of the headphones are best at 'something', I guess here's my breakdown:
Sonys are best for ANC and good sound quality.
PXs are best for fairly neutral sound and wide soundstage as long as your source is good - watch for the comfort.
H9Is are best for a deeper sound, good soundstage and a sparkling upper end (but concerns of them being too sibilant). Too expensive (imo).
H9s are hard to justify now.
QC35s seem hollow to me.
If you're penny pushing (well.. kind of) get the Sonys - I see them for ~$350 CAD here and there.
I'll report back in March.