Making a PC for my buddy, how can I improve my parts list?

Case: Cooler Master MasterBox Q300L

Ram: TEAMGROUP T-Force Vulcan Z DDR4 16GB

GPU: EVGA GeForce GTX 980 Ti Hybrid 6GB

Heatsink: ID-COOLING SE-903-XT V2

Power supply: Segotep 650W 80 Plus Gold

SSD: KingSpec NX Series 512GB

Mother board: GIGABYTE B365M DS3H

CPU: INTEL CORE i7-9700K

Total price: $630

Any tips?