ASUSTOR's AS3102T is our new #1 ranked RAID 1 NAS.
Synology's DS418j came close to taking the #1 rank for RAID5 NASes.
Thecus' N2350 is a two-bay SOHO NAS with decent performance that won't empty your wallet.
Synology's DS1817 provides high capacity and 10 GbE connectivity at a reasonable price.
QNAP's TS-453B is an expensive four-bay NAS, even before adding optional 10GbE.
Updated - Synology's DS1517+ is an attractive choice for a 10GbE capable NAS.
QNAP's TS-431X is an inexpensive way to move up to a 10 GbE NAS.
QNAP's TS-231P is a good value in a RAID 1 NAS.
QNAP's TS-228 is inexpensive, but makes performance compromises to get there.
You could win a pair of Google OnHub routers!