You don’t necessarily need a huge gaming machine to enjoy VR and top games. Take the MSI Vortex for instance. It is high performance VR-ready gaming machine with an unlocked Intel Core i7 6700K processor, up to 64GB of DDR4 memory, dual NVIDIA GeForce GTX 980 graphics cards, and SSDs. It has an expandable design and comes with various connectors, including Thunderbolt 3.
Vortex has a silent cooling system. It comes with a 450W 80 plus Gold power supply. It can also support up to 6 video outputs and is 4K ready. You can interact with the machine using the Dragon Center Dashboard and App. The cheapest version sets you back $2199 though.