Momentum Wireless (M2 AEBT)

I have Sennheiser HD1 from 2015 and they are still going good. The current equivalent is the Momentum 4 I think.

Both. Momentum 2 and HD6xx. Not ready to upgrade to Momentum 4. I very much prefer the metal premium look and feel of the 2. My daughter has the 4 but it’s not for me.

The style, fit, and materials make OTE a difficult and personal choice, even when you know what sound you're shooting for. I've been seeing lots of people online lately complaining about OTE and the hot sweaty ears. I haven't had this problem, but there are many companies selling replacement earpads such as cooling gel. I've gotten a couple pairs of Lambskin leather from Soulwit for Momentum 2 and Momentum 4 and they've been great. I don't get the hot ears with the M4 that people are complaining about and the memory foam is much more dense and high quality than the original thin ones. Both the Momentum 4 and Beyerdynamic DT 900 Pro that I got this year have caused pressure and headaches. They took a couple weeks of use before they were broken in and now I can wear them for 4-8 hours without noticing they are even there.

Sennheiser momentum wireless 2. Timeless look, amazing sound with noise cancelation.

The old sennheiser momentum 2 wireless are incredible and I've had and used mine for many many years. They come with a wire you can attach/detach. I'd probably buy those in a heartbeat if mine ever manage to break. Sturdy, great sound, controls have died on mine but they're not really needed. Comfort is decent for an hour or two but then they can get a bit uncomfortable.

TBF still on my momentum wireless 2s and while battery has decreased it is still very decent and I don't even remember how old they are

Good choice sure...I went with the OG Momentum AEBT and picked up a pair in pristine condition, only needed a replacement battery (from aliexpress). Earpads were original and in excellent condition. Granted they are before the smart app came out...but the style is so premium imho and the sound is mellow with sufficient NC for me at least.