May I ask which headset you are going for and why? I've got my eye on the Oculus rift, because it's the one I've heard the most about. Are the others any better?
My leading contender right now is SteamVR. That's a combination of the headset's capabilities (room based VR), the controllers, the company supporting it, and the headset's actual specifications. I'm also pretty pleased that it will be out first so I will get to try it first.
Oculus Rift is my old favorite before we knew SteamVR was a thing earlier this year. My first real modern VR experience was with a DK2 and it was so eye opening. I'd like to think the release version will be great, but from what I've seen of published specs I don't feel they're pushing resolution high enough in their first iteration. This is probably to keep it accessible as not everyone has a GTX 980 equivalent or higher graphics card and you won't sell headsets if people can't run them. The 970 equivalent base specs keep it accessible, though not super exciting for the rest of us. Also, it's strictly sit down and its head tracking system is nowhere near as flexible (or potentially accurate) as SteamVR (reported by Valve to be within 2mm three dimensionally). I think what will make Oculus Rift sell is brand recognition and accessibility with lower required hardware. Bundling the XBox One controller with it makes it seem more friendly to casual gamers as well.
I can't really get into Sony Morpheus. Don't know why.
My favorite under dog at the moment is StarVR. The field of view is insane and I like how the company does business. I believe 100% that they won't release unless they're totally pleased with the product. Plus, they are going to use Steam's OpenVR initiative which makes them quite compatible in the long run. The down side is they're using massive displays relative to the other guys so you're going to need serious hardware to run them with acceptable frame rate and lag. Probably a Pascal halo card to really enjoy this.
Anyway, that's my thoughts on them at the moment. It's always changing as it comes. I didn't include HoloLens because it's AR, not VR. I do plan to have one anyway since it's unique. I will probably buy a SteamVR first, consider an Oculus Rift (probably decide it's a downgrade, but might buy for interesting exclusives), and when StarVR hits it can be the Ferrari of headsets.
No, I don't care if I buy all four.