Motherboard and power supply

[trapmakers]

so I'm gonna build a gaming pc (or rather, spec one and buy it):
intel i5 8600k
nvidia gtx 1060 6GB
16GB (2x8) corsair vengeance ddr4 2400mhz
coolermaster liquidlite 120 (i think?) cooler
1TB seagate barracuda HDD
250GB samsung 860 EVO SSD
450 or 550 watt power supply

so ive only now got to decide what motherboard is the best for this build when im trying to spend as little as possible without sacrificing anything.

im picking between the gigabyte z370p d3 and the asus prime z370-p
anyone got any advise here? also, would 450 watt power supply be enough for this build if i may in future want to slightly overclock, if i can figure out how/if i feel its necessary?
tah

 

[animemangamer]

I composed your selections in a PPP list and I made some modifications (This doesn't include your choice of case/chassis):

PCPartPicker part list / Price breakdown by merchant

CPU: Intel - Core i5-8600K 3.6GHz 6-Core Processor ($239.00 @ Amazon)
CPU Cooler: Corsair - H60 (2018) 57.2 CFM Liquid CPU Cooler ($59.99 @ Newegg)
Motherboard: Gigabyte - Z370 AORUS GAMING WIFI (rev. 1.0) ATX LGA1151 Motherboard ($109.89 @ OutletPC)
Memory: Corsair - Vengeance LPX 16GB (2 x 8GB) DDR4-2400 Memory ($143.88 @ OutletPC)
Storage: Samsung - 860 Evo 250GB 2.5" Solid State Drive ($56.99 @ Amazon)
Storage: Seagate - Barracuda 2TB 3.5" 7200RPM Internal Hard Drive ($58.99 @ SuperBiiz)
Video Card: EVGA - GeForce GTX 1060 6GB 6GB SSC GAMING Video Card ($259.99 @ B&H)
Power Supply: Corsair - CXM 550W 80+ Bronze Certified Semi-Modular ATX Power Supply ($38.98 @ Newegg)
Total: $967.71
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-09-26 10:26 EDT-0400

CPU Cooler: If you want a single liquid cooler you want a reputable trusted brand to do that. (One Leak = R.I.P. PC)
Motherboard: The price of those you mentioned are around the same price as this one and it includes Wi-Fi/Bluetooth too + RGB.
Storage: You don't really want to get any HDD less than 2TB now since the price difference is too small around $5~10.
Power Supply: 500w~600w is plenty enough for a system like this but you want to be from a reliable provider as well like Corsair. You can also get an Seasonic EVO or EVGA B3.

 

[vMax]

I would go with a better Power Supply than 450w and something with a lot more quality like the Seasonic M12II EVO 620W 80+ Bronze...A good power supply is very important..The Seasonic at $59.90

Or the EVGA 100-BR-0600-K1 600 BR, 80+ Bronze 600W on sale at $44.99 both on Amazon..

The EVGA 120mm AIO is on sale EVGA CLC 120 CL11 Liquid/Water CPU Cooler at $39.99 again on Amazon...

The newer version EVGA CLC 120 Liquid/Water CPU Cooler, RGB LED
by EVGA is on sale at $59.97