CPU/RAM > GPU, maybe...
I just want to add my 2 cents.
I fly exclusively VR. I ran a rift on a GTX 1060 6GB, i7 4th gen cpu with 16GB ram and M.2 storage, and wasnt happy. Bought an RTX 2080 and stuffed it in and although a reasonable improvement, I still wasnt happy. Decided to upgrade CPU , RAM and MB. Now running an i5 9600k, 32GB RAM and the 2080 and without overclocking anything I am more than satisfied with the results.
Settings wise I pretty much have the same a Matt Wagner does in his video - including grass and clutter max.
Bottom line, for VR, the CPU and potentially the RAM upgrade was a much bigger improvement than the GPU upgrade.