If you are used to IEMs for isolation during commute, over ear headphones without active noise cancellation are not going to provide the same isolation as a decent pair of IEMs.
If you want headphones for commute, a case to fit the ATH-A900X is huge; not going to want to commute with it. And you don't want to carry those in a bag without a case as the wings are somewhat delicate. Doubtful they would last long for daily commute without a case. The HP50 are some of the more commute friendly full sized headphones in terms of carrying them in a bag. They lay flat in their soft case and don't take too much room. I carried mine all over SE Asia for a month last year. (not my pic)
There are some like new HP50 used on Amazon for $129.99:
https://amazon.com/gp/offer-listing/B00E1UVXHO/. Fulfilled by Amazon, so if they are not like new, Amazon should pay for the return.