I think the very best experience you will ever have, and the most convenient, is to get a great Bluetooth headphone, such as the Drop + THX Panda. First be very confident because this is true, well done Bluetooth sounds as good as any wired connection. Bluetooth technology and headphone designs using it have become very, very good. There is no reason not to embrace wireless headphones, certainly for portable. I actually loved the Oppo PM3 and it was my portable headphone of choice. I even had PETEREK from here in the forums make me a custom cable so that I could drive the PM3 balanced using my Onkyo DPX1. I loved the sound of the PM3 and the Onkyo, it was so nice to have that type of setup for on the go. But I kept getting the cable yanked and caught on things when riding public transit. One day I had had enough and I was worried all the time about my gear getting damaged so I decided to start learning and using Bluetooth headphones for portable use.
I have never gone back to wired headphones for portable use and I never will. Bluetooth is that good to me. So why am I suggesting the Drop + THX Panda to you? Because Drop purchased all of the rights to the Oppo headphone technology and the new headphone is literally built from and inspired by the same technology as the Oppo line of headphones, and that was a fantastic lineup. It was a huge loss in my opinion when Oppo exited the headphone business, but now Drop is going to be able to keep some of those amazing designs alive. I think the Drop + will be extremely comfortable, it will be very well designed and most importantly it is going to sound very good. That is my educated guess so if you really want to enjoy the best quality audio on the go using your V40, plus the fact that clearly you like the PM3 makes me feel strongly about bringing the Drop + up for your consideration.
There are many fantastic portable Bluetooth headphones to consider, the Drop + is one of many solid choices. I have owned quite a few and the next Bluetooth headphone I will try is without a doubt the Drop +. Good luck whatever you decide.