Well, if you have shitload of money, best overkilled PC for gaming is this
beast:
Processor: Intel Core i7-5960x
CPU Cooling: Corsair Hydro Series H110i GT
Motherboard: MSI X99A GAMING 7
Memory: Corsair Dominator DDR4 32GB 2666MHz
GPU: Gigabyte G1 Gaming 980Ti 6GB
HDD: Seagate 2TB
SSD: 512GB Samsung 850 Pro Series
PSU: Corsair Professional Series™ AX860
Case: Corsair Graphite Series™ 760T
Total Price: ~$3k from Amazon.
You just can't go wrong with this build because it will play any game on maxed out graphics without any problems for straight 5 years+.
Also, if you need any help, there is subreddit called "PCMasterRace
(may our framerates be high and your temperatures low)", feel free to ask questions there.
https://www.reddit.com/r/pcmasterrace/