PC Upgrade: Buying from Amazon

Hey guys, I’ve got a chance to have a cousin bring me some parts from the US back home

I've decided to upgrade my old rig, so I'm keeping just these:

NZXT Lexa case

650W Power Supply, LC POWER Silent Giant GREEN POWER LC6650GP3 V2.3, 140mm fan.

1000.0 GB Hard Drive, Western Digital Caviar Black, SATA3, 64MB cache, 7200rpm, for desktop

I'd grab the processor, GPU, and 16GB of RAM through Amazon.com

The rest (motherboard, 256GB NVMe M.2 SSD, and a CPU cooler if needed) I'll just pick up at a local US shop

I pulled some prices for the stuff I can actually snag on Amazon.com

Intel Core i5-8600K desktop Processor 6 Cores up to 4.3 GHz unlocked LGA 1151 300 Series 95W [$567]

Intel Core i5-8400 desktop Processor 6 Cores up to 4.0 GHz LGA 1151 300 Series 65W [$403]

AMD Ryzen 5 2600 Processor with Wraith Stealth Cooler - YD260BBAFBOX [$360]

AMD Ryzen 5 2600 x Processor with Wraith Spire Cooler - YD260XBCAFBOX [$437]

EVGA GeForce GTX 1060 SC gaming, ACX 2.0 (Single Fan), 6GB GDDR5, DX12 OSD Support (PXOC), 06G-P4-6163-KR [$567]

XFX RX-590P8DFD6 Radeon RX 590 Fatboy 8GB OC+ 1600MHz DDR5 3xDP HDMI DVI Graphic Cards [$567]

XFX Radeon RX 580 GTS Black edition 1425MHz OC+, 8GB GDDR5, VR Ready, Dual BIOS, 3xDP HDMI DVI, AMD Graphics card (RX-580P8DBD6) [$415] ( Amazon best buy )

Corsair Vengeance LPX 16GB (2x8GB) DDR4 DRAM 3000MHz C15 Desktop Memory kit - Black (CMK16GX4M2B3000C15) [$250]

Corsair Vengeance LPX 16GB (2x8GB) DDR4 DRAM 3200MHz C16 Desktop Memory kit - Black (CMK16GX4M2B3200C16) [$277]

Patriot Viper gaming RGB Series DDR4 DRAM 3200MHz 16GB Kit - Black - RGB Color Profiles [$307]

I'm looking for the best bang for my buck, but if one part gives a massive performance boost, I might consider bumping up the budget.

Which three components should I go for?

Thanks in advance for the help.

For the GPU, you might want to hold out for the Nvidia 1660 or 1650Ti dropping later this month.

As for the CPU, I'd go with the Ryzen 5 2600. Honestly, take whatever you would've spent on an Intel Core i5-8600K desktop Processor 6 Cores and dump that extra cash into a better graphics card instead.

Ryzen 2600
16GB Corsair CL15 3000MHz
RTX 2060 😁