>>295143107
Link now works with the provided cable.
Carry case is not an issue if you intend to use it as a PCVR headset primarily, if not you don't need anything special.
Deluxe Audio Strap is helpful, but there are other options and frankly I kinda got used to normal strap, especially with headphones on.
Battery pack depends on how long are your sessions, never found a need to dedicate any of mine to the Quest.