Funnily enough, the extremist tier matches almost exactly with $2000.
Going that high is a waste of money. After a certain point, you run hard into diminishing returns. For example, the i5-6600 (one step below the
"exceptional" tier there, which uses the -K model of the same chip designed for overclocking) is currently retailing for $229.99. The i7-5930K (extremist tier) is $579.99. For that extra $350, you get two more physical cores (largely useless, most games and other programs barely utilize 4 cores well), six fake cores added with hyperthreading (entirely useless), and .2 ghz higher clock speed. Going with the better processor is only worthwhile if you want to do 4-videocard SLI, which is pointless and ludicrously expensive.
Putting
this CPU into
this motherboard, with decent RAM will run you around $425. Add in one of the most powerful GPUs on the market (The GTX 1080, probably excessive) for $699 will bring you to $1125, and a nice case and power supply will take you right around the $1500 mark. The result will be a computer that can easily handle the Oculus rift, let alone the less-demanding HTC Vive.
Best of all is that all Skylake CPUs use the same socket - you can grab the i7 later and drop it right in, and if you want to preserve SLI capability for later you just need to spend an extra fifty bucks now to get an excessively good motherboard.