Luma pro or ultra? Neckband or not?

Trying to work out the best option for me. Any advice?

Had a previous model and was out off by the twitchiness when playing games in that slight movement of the head was distracting as the screen follows those movements.

So I'm trying to work out which will be best for me to watch content and play games with the screen fixed in a set position. Id be watching from an android phone, movies, YouTube, streaming channels etc. id also be playing games in the ROG AllyX handheld pc.

Would the ultra be ideal for that or will it still need the neckband to achieve this fixed screen position? Can the pro do that with the neckband? I'm so confused by the options from viture.

Pro and neckband combo? Ultra on its own? What's going to give me what I'm looking for? (Not interested in hand tracking etc just the fixed screen)

Thx.