>>289356334
>Would you recommend a first buyer to go all out
The Index isn't $600 better, and by the time you're ready to upgrade you should have more alternatives. I don't think it makes sense unless you're already spending a lot of time in VR.
>is a Rift S gonna keep me hooked for long enough to justify its faults?
I don't think it has any major faults. The tracking is fine, and you can still get FBT working later if you end up really wanting it.
>>289356757
>Which one of the two are better
Rift S is way better than Cosmos. The only benefit to the Cosmos is that you could upgrade to SteamVR tracking later, but that ends up being so expensive that you might as well just buy an Index if you're going to do that.