Sabrent Rocket Q M.2 SSDs now available in 4TB and 8TB variations
I have had nothing but great success with these Sabrent M.2 SSDs. I personally use a 2TB one in a custom aluminum enclosure and it consistently delivers super-fast speeds on both read and write. While a bit expensive for now (but not as expensive as 4TB RAID SSDs), you can be sure that now that these are out that the prices will drop significantly very soon. Get them here if you need!