If you are looking to upgrade to a new M.2 NVMe solid state drive, make sure you check out this review of the Kingston KC2000 1TB at ProClockers.
The world of SATA based SSD’s is slowly coming to a close with the raw speed and performance of PCIe based drives falling to near price parity. The benefit is radically increased bandwidth, up to about 6x the raw speed and some drives are so small they can slot right into your desktop motherboard or laptop with no need for pesky cables.