Depends how much money you want to spend. As for GPU, looks okay if its only for D3. As for SSD, I think you should consider 500GB+ version. They are quite cheap right now, or if you want performance over price, then go Samsung 850/950 PRO.
Go with a Samsung SSD. The expensive models are incredible but an EVO 250GB will also make you a happy camper. 500GB is a solid recommendation if you can swing it.
Don't be surprised if you find yourself looking into CPU cooling systems in the near future.
Edit: I see you already have an SSD. Good luck with your build.