3200 cl16 should be plenty. You will want a bigger ssd or a secondary standard SATA ssd for VR games - the tend to be large installs and incredibly slow to load off a HDD.
before getting higher RAM frequencies, would get a 8700K. You won´t have to OC, but it´s got 500MHz more base clock than the non "K" CPU, which will get you more out of your machine than quicker RAM on an Intel system
The case this system has to fit into is very very small and so I can only fit a cooler for 65W TDP so it has to be an 8700 not 8700K and definitely can't do any OC'ing
Its a portable PC made by a company called Acme about 10 years ago, originally it had 2 * GTX 280's in it, the reason the CPU cooler needs to be so small is because the PSU fits over the top of it.