Best overall: Adata XPG SX8200 Pro (1TB)
PCIe 3.0 x4 / NVMe 1.3
Sequential Reads/Writes: 3,500 MBps / 3,000 MBps
Best 1TB M.2: Samsung 970 Pro (1TB)
PCIe 3.1 x4 / NVMe 1.3
Sequential Reads/Writes: 3,500 MBps / 2,700 MBps
I might just be poking holes... but given the "best overall" is a 1TB...