Synology's DS416 and DS416j are both good values in four-bay RAID 5 NASes.
Promise announced a Private Cloud NAS at an affordable price at CES 2017.
QNAP announced a slew of high-end NASes and its first wireless AC router with built-in storage at CES 2017.
TerraMaster's F2-220 Cloud Storage NAS has a good feature set, but isn't a good value in a two-bay RAID 1 NAS.
Updated - NETGEAR's ReadyNAS RN626X has two built-in 10GbE ports and can make good use of them.
QNAP's TS-251A and TS-451A provide the option of direct attached storage with a twist.
Our tests shows ZyXEL's NAS326 leads the price-performance pack for two-bay NASes.
Thecus' N2810 brings Intel "Braswell" power to its two-bay small-biz lineup.
Don't be limited by simple NAS backup options.