I am a big fan of the Synology NAS's - for a long time a Synology NAS has been my number 1 recommendation for a home or small business NAS device. The combination of price, performance and features makes them pretty much ideal if you are willing to pay the premium for a pre-built NAS. I've especially liked the DS1010+ and its successors because of the size and expandability plus the speediness of file transfers. I like Synology products so much that  I personally am running two DS1010+ units, each with one 5 disk expansion unit (the DX510).…