At this point I would hold off on any VR headset. I believe that the next generation version of the hardware is just around the corner.
Don't get me wrong, I love my CV1 and the experience that it offers. If you feel like you can't wait for the next gen, which may be months away, go ahead and get the Rift. So far it has the best experience for DCS. The Odyssey has the best image at this time and someone who owns that can provide more details on that headset.