I would not get a multi rail psu.
This should be more than enough for your needs.
https://www.newegg.com/Product/Product.aspx?Item=N82E16817438120
What's the purpose of the extra cpu cooler?
For mid range gaming your gpu should be fine.
Here is what I have so far, please comment, advice and criticism is welcome.
Budget: $1100
CPU: AMD Ryzen 5 1600 3.2GHz 6 cores
MoBo: MSI B350 Gaming pro ATX AM4
Cooler: NZXT Kraken x52
Memory: Corsair Vengeance LPX 2x 8GB, DDR4-3000
Storage: Western Digital Caviar blue, 1TB 7200RPM
Graphics card: EVga GeForce 1050 Ti 4GB (Can I get away with something lower than 1050?)
Power Supply: EVGA SuperNova NEX 650 watts 80+ gold full modular (Can I go lower than 80+ gold?)
Case fans: Corsair Air series 2 pack
Ext. Storage: Toshiba Canvio Basics 1TB
Other:
Corsair K55 RGB keyboard
Corsair M65 mouse
Asus 23 inch monitor

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