For mobile usage, QC35 sounds really good and extremely comfortable, other alternatives are MDR100ABN and MDR1000X. (I personally went with MDR100ABN for mobile.)
Sound quality incl. sound stage (surround) is also superb.
The main issue for all BT headphones/sets, if you wanna use them for gaming/movies via BT on PCs, you can not go cheap on the BT dongle/adapter. Why? I tried quite a lot of dongles in the past, cheap dongle could cause massive input lag. The sound will be heard late...the game/movie will not be that enjoyable anymore.
Actually, for PC, I prefer to get something like Sennheiser HD599 (I personally went with this) and a decent DAC/soundcard.