Here are the parts of chosen. I am looking to build a gaming PC with the capability of doing other things. Would this be sufficient or would I need to add an HDD or anything? Are any of the components overpriced? Thanks for your time.
Corsair, Graphite Series 230T Windowed Compact Mid-Tower Case, CC-9011042-WW $80
EVGA GeForce GTX 1070 SC GAMING ACX 3.0, 08G-P4-6173-KR, 8GB GDDR5, LED, DX12 OSD Support (PXOC) $560
CORSAIR CX-M Series CX550M 550W 80 PLUS BRONZE Haswell Ready ATX12V & EPS12V Semi-Modular Power Supply $65
CORSAIR Vengeance LPX 16GB (2 x 8GB) 288-Pin DDR4 SDRAM DDR4 3000 (PC4 24000) Desktop Memory Model CMK16GX4M2B3000C15W $190
Noctua NH-D15 SSO2 D-Type Premium CPU Cooler, NF-A15 x 2 PWM Fans $86
SAMSUNG 960 EVO M.2 500GB NVMe PCI-Express 3.0 x4 Internal Solid State Drive (SSD) MZ-V6E500BW $200
Intel Core i7-8700 Coffee Lake 6-Core 3.2 GHz (4.6 GHz Turbo) LGA 1151 (300 Series) 65W BX80684I78700 Desktop Processor ... combo price with motherboard below of $446
ASRock Z370 Extreme4 LGA 1151 (300 Series) Intel Z370 HDMI SATA 6Gb/s USB 3.1 ATX Intel Motherboard
Corsair, Graphite Series 230T Windowed Compact Mid-Tower Case, CC-9011042-WW $80
EVGA GeForce GTX 1070 SC GAMING ACX 3.0, 08G-P4-6173-KR, 8GB GDDR5, LED, DX12 OSD Support (PXOC) $560
CORSAIR CX-M Series CX550M 550W 80 PLUS BRONZE Haswell Ready ATX12V & EPS12V Semi-Modular Power Supply $65
CORSAIR Vengeance LPX 16GB (2 x 8GB) 288-Pin DDR4 SDRAM DDR4 3000 (PC4 24000) Desktop Memory Model CMK16GX4M2B3000C15W $190
Noctua NH-D15 SSO2 D-Type Premium CPU Cooler, NF-A15 x 2 PWM Fans $86
SAMSUNG 960 EVO M.2 500GB NVMe PCI-Express 3.0 x4 Internal Solid State Drive (SSD) MZ-V6E500BW $200
Intel Core i7-8700 Coffee Lake 6-Core 3.2 GHz (4.6 GHz Turbo) LGA 1151 (300 Series) 65W BX80684I78700 Desktop Processor ... combo price with motherboard below of $446
ASRock Z370 Extreme4 LGA 1151 (300 Series) Intel Z370 HDMI SATA 6Gb/s USB 3.1 ATX Intel Motherboard