If the noise cancelling and sound quality on these is great, I may actually go from the Sony cans to these, mainly due to Bluetooth pairing woes. With the Sony headphones, if I want to switch from iPhone to Macbook I have to do the dance of Bluetooth repairing. Switch off BT on iPhone -> connect headphones to Mac, switch iPhone BT back on.
The sound would have to be in the same ballpark though, which is hardly a guarantee given my experience with IEMs in the past.