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This should do the job.
You can expect 60FPS or higher for pretty much any game at 1080p with ultra settings.
I also included a 256GB SSD, which I recommend you use as a boot drive, as well as installing a couple of most used software/games in there. You can dump the rest of the less important files in the 1TB.
By the way, I did not include an optical drive as nobody really uses them anymore. If you're unsure if you're going to be able to install the OS through USB, then just get this optical drive.
All cables are included with each individual components where necessary. The only thing you actually need is a Phillips screwdriver. You can also pick up some zip ties for cable management, but they're not necessary to make your computer work - it's only for aesthetic purposes.