Budget build

[scj6771]

Looking to do another budget build, maybe $600 or less if possible, below are my current specs of the PC I am running now and have been very happy with, just looking to build something on the side for fun really, any thoughts or suggestions on some hardware? I can do the legwork once I have a good idea of what's "hot" and fairly inexpensive right now, I do game but nothing serious. I would like to go SSD maybe for my games drive and NVMe for my OS, however I do realize that may be out of my price range right now. Thanks as always.

Mobo: Z170A SLI Plus
CPU: i7-6700K 4.00GHz
Memory: Kingston HyperX FURY Black 8GB 2133MHz DDR4
GPU: Radeon RX 580 8GB
Power Supply: EVGA 600 B1, 80+ BRONZE 600W

[chazus]

Can you explain a bit better what you mean by a "side system for fun"? Is it replacing this one? A different location? Just a bit confused as to the purpose, or if you're wanting to upgrade something.

[scj6771]

Can you explain a bit better what you mean by a "side system for fun"? Is it replacing this one? A different location? Just a bit confused as to the purpose, or if you're wanting to upgrade something.

Sorry for the confusion, this will be a second build, I have a large office so I will still be using my current rig, I think I have a nice 650 watt PSU laying around so that is out of the way ...Oh, and I do have a full size case as well.

[Thunderball]

Sorry for the confusion, this will be a second build, I have a large office so I will still be using my current rig, I think I have a nice 650 watt PSU laying around so that is out of the way ...Oh, and I do have a full size case as well.

Can you please define "fun"? Is it gaming, HTPC or maybe overclocking fun? Something else?