Just ordered a new case (Corsair 400q) and next im going to get either a RX 480 or a GTX 1070. After that I will upgrade my PSU to a better one and then a better monitor. Mine has too much BLB which isn't preferable with dark games/movies.
If you are using your PC as server, then Intel 750 series is the drive suited for enterprise type workloads, or else seagate 1200. For normal workloads, samsung 850 pro, 950 pro NVMe M.2 are good too. If you're confused or have any doubts related to SSD this guide might help you.Sean's SSD Buyers Guide & Information Thread