Instead, what you should be looking for is "Necksafer". 😉
There are two versions of Necksafer, VRNecksafer and XRNecksafer.
DCS now defaults to OpenXR, so you'll want the latter one: https://gitlab.com/NobiWan/xrnecksafer
Can't help with the comparison to the Crystal, as I haven't tried one yet.
I did try the Pimax 8KX, and the wider FOV does impress right away, somewhat fixing that downside of the HP Reverb G1 and G2 (which feel like looking through "divers goggles" or "binoculars" if compared) but the image is not as crisp, it was more demanding on resources, and comfort was appaling in comparison (HP Reverb G1 and G2 still better).
Reading instruments is not as easy or imediate on the Pimax 8KX. It's not that it's bad (it isn't) and I guess one could get used to it, but I personally couldn't get over it.
I think it's a matter of what you're looking for and prefer.
The "sweet spot", as is the FOV, on both the HP Reverb G1 and G2 may be a bit small, but it's still so good, as are the colors, that I find even newest headsets barely improving in these aspects while being quite a bit more demanding on resources (and far more expensive). Same for the comfort, and the sound.
I haven't tested many but, from all HMDs I tried with DCS - HP Reverb G1 (v1 and v2), HP Reverb G2 (v1 and v2), Oculus/Meta Rift-S, Quest 2, Quest 3, Pico 4, and Pimax 8KX - both the HP Reverb G1 and G2 proven to be the best and by far (for me).
Also, and perhaps controversial, but I even found the 2nd version of the HP Reverb G1 (aka Reverb G1 Pro) as good, if not better, than both the Reverb G2 v1 and v2, with only the sound and comfort being better for me on the G2 v2. Could be from the units themselves and not representative of all in the market, but... there is that.
There's the issue of cables, on both HP Reverb models, that may get broken with time and harsh use. But there are sellers on EBAY selling replacements at lower prices than before (as are the G1 and G2 headsets themselves, plenty mint ones available in second hand market), as VR users have abandoned them due to the WMR software breaking issues with latest Win11 24H2 update (now also affecting Win10 with latest updates). There are also mods to atempt fixes on cables, but may be complicated for most users.
I think the downside of Windows updates breaking WMR, and HP no longer producing them, are really the only main problems on the HP Reverb G1 and G2.
Otherwise, they'd still dominate as the unbeatable balanced choice of VR headsets for people who are into simulators today, for DCS inclusively. Great image, comfort, sound, and inside-out tracking, all provided right out of the box, without outrageous prices or brutal hardware requirements.
I'm reopening the CGTC mod thread, as I accidentally deleted the original thread, thanks to some new odd forum options (I thought I was deleting the pop-up!!)... 😕
Someone decided to put an option for bugs related questions in the Mods section...?? ("mark as solution"...huh??) 🤦♂️ Lost all of the older posts because of it!
LucShep's post in Key assignment for 'look behind'? was marked as the answer