Using an Oculus rift since december, with an I7 3770k and gtx 980, i'm still switching Vr and flat screen... Vr is really immersive, no doubt, but with my computer specs I use VR with mostly low settings and time to time, I like to run with higher settings to enjoy the full beauty of DCS.
VR is not recommended when you learn a module and use paper documentation or video.