I keep being more and more tempted to get a rig.
Before you do it, try your best into getting it to use it first. I have used my Oculus Rift for more than 2 years and I'm still unable to use first person game mods. The motion sickness is horrible, no more than 2 minutes and you will feel bad with a terrible headache. VR sounds like fun but it's not for everyone.
Pardon me if I'm off topic but this game even if it's pasive it's still troublesome for some people. Why? Your brain can't adapt to the fact that you are moving virtually when you are standing still or seated, that translates to motion sickness, when you do abrut or quick turns things go from bad to worse. The only way the industry have managed to let everyone enjoy VR is by making games where you don't move and when you want to, you "teleport" from one side to another, that way you don't get nausea.
On VR by looking around you will find the experience enjoyable because in that case it IS your head moving and your brain saying, yeah this is ok. but the moment you move... game over.
One last thing, you can move without feeling bad but veeeery slowly, VR works great with Flight sims, because you are confined to a cockpit and your surrounding moves very slow.
A year ago I tried the alien isolation VR mod. I swear it.. I tried very hard and I failed.. no more than 10 min gameplay without feeling bad (motion sickness).