I generally buy second user ex-corporate equipment, which suits my use-case...I guess you are going to use it for gaming with that gfx card which is worth more than my whole computer LOL
I picked up a server with 16 drive bays and a reasonably power efficient but capable CPU for about $100...I then use VNC to connect to it from a HP 800 G1 desktop that supports two displays, 4k + 1080p, which I bought for $50...I can keep an eye on the downloads on my server via the 1080p, whilst I do other stuff on the 4k screen...like youtube/plex