The AS4004T with 10GBE is a nice fast and cheap NAS, that does not consume much power.
Exactly what you want if you need a fast HDD in the LAN without frills.
Unfortunately, 4 bay is pretty small and the AS6004U is not a good option.
Are larger versions planned and when are they coming?
5, 6 or 8 bays would be nice for raid 6, internal backup or multiple SSD.
)An alternative is the DS1817 / DS1817 + only from the competition. ;-(
CU