Older topic I know but...I wonder why folks think a NAS has to be a one-trick pony, especially in the SOHO and satellite office sort of setups.
Having a lower-powered NAS is wonderful for remote backups, a lot of read-only access from other machines on a local network, scheduled activities and lower volume/less latency dependent tasks etc. But many of us have a main workstation which we prefer to have the fastest possible connection to our data because we have lots of random client requests and may be juggling a dozen different projects at once, and need to keep power, size, storage etc as concerns.
Personally, I'd love a thunderbolt enabled NAS so that I can move a lot of storage out of a workstation array but still have the speed of it when I need to work on and shuffle around a ton of files to my local machine, especially if they're longer term semi-archived projects. But then have the main machine off and just a much more streamlined and lower powered NAS for the rest of the time for maintenance activities and general or remote access when the need arises too.
Different setups for lots of different people and situations