No, do not buy a DK2. This is coming from a DK2 user who then bought a CV1 and will buy a CV3,4,5,6...etc.
resolution is just too low, hell even the CV1 is not that great. I currently run a i7 6700k oc to 4.6, 32BG ram Nvidia 1080 about to switch to the Ti. In most sims you need to lower the detail to achieve the required 90fps and its still no way near as good as my 4k monitor or even running on my 16:10 1920x1200 displays in triples. However I can no longer sim with monitors, I am totally hooked on VR.