M2 PCIE Gen 4 WD SN770 (!!). These drives are extremely fast (if your computer supports Gen 4, and don't assume it does), and compare favorably with Samsung's drives. Also, save 25% if you buy two.
$60. 1TB
$119. 2TB
All their drives are on sale but the slower drives are not that big of a deal (I can match them most days, though only a few dollars less and these have favorable warranties), but Gen 4 drives this cheap are rare.