TrackIR is an absolute must if you want to get serious with vehicles. For infantry, I end up toggling my TrackIR on and off to free look when I want. It is free look with my head motion being that of the mouse.
I have an Oculus Rift DK2. The only game that I am comfortable playing with it is iRacing. I get motion sickness after about 10 mins with any other game. Even with iRacing, I start getting a headache after about 30 mins. While I believe this could be overcome by more use and conditioning, I dont feel that it is worth the effort at this time.
I think the Omni would be best used surrounded by projection screens. Your head movement and optical sensory input would be more natural.
