Samsung's new 950 PRO SSD went up for pre-order today. While we haven't gotten our hands on this 3D V-NAND powered NVMe SSD (yet), a number of other websites have posted reviews. With sequential read/write speeds of up to 2,500 MB/s and 1,500 MB/s and a price starting at $200, the 950 PRO looks to be a real contender in the enthusiast SSD market.
Update: The 256GB and 512GB versions of the 950 PRO are now in stock at Amazon.com!