I suggest building a rig over buying a pre-built. It honestly costs less. On the gaming spectrum, here's what I have in terms of hardware:

OS: Windows 10 Home Edition 64-bit
Processor: AMD FX(tm)-6300 Six-Core
Graphics Card: NVIDIA GeForce GTX 960
RAM: 8GB
Storage: 1TB

You will need more than that but my entire rig, including the case, power supply, etc. cost me just under a grand.

wow... we have a lot of friends in common

Haha, I wish!