@many-intern-37109 head over to a Croma store and try out all the three headphones. They have trial pieces here in Pune at least. Bose QC35, Sony MX1000s and Sennheisers PXC 550.
If you are putting that kind of money down for a headphone, you should listen to them first hand. Also, Bose, unplug their demo music and connect to your phone. Their demo music is extremely high fidelity and sounds awesome. Not so much on your phone.
I tried all these and finally bought the Sennheisers as I am used to their sound profile. They tend to be a bit warm. Plus 30+ hours on single charge. The Sony’s has the maximum features and Bose had the best noise cancellation.
So, your mileage may wary. Don’t buy them without listening like I have done in the past. lol and regretted 😊
Seems like the px550s are for 18k on amazon today as well for the next 16h