I'm currently also looking for my first VR headset, although I'm not experienced with DCS, I'm just starting out. In fact, I am building my first PC mainly for DCS.
What would you say about the Oculus Quest? How does it compare resolution wise to the Rift S?
Currently, I'm really torn between the Quest, the Rift S, and the Reverb, especially considering the latter is on sale now in the UK. For now I mainly intend to use the headset for DCS and other flight simulators, but I'm not excluding trying room-scale VR gaming in the future.
P.S. I did manage to briefly try out a Rift CV1 and a Rift S. Something that I noticed was that I had a smaller FoV with the S compared to the CV1. However, the apparent resolution was much better. Could the narrower FoV be down an "incompatible" IPD that I have? Is the FoV of the Reverb bigger than the Rift S?