We are fans of Synology products at KitGuru, we reviewed their DS710+ weeks ago and were impressed with the quality and speed of the product.
Today they announce two new high performance NAS servers, the Diskstation DS411+ and the RackStation RS810+. Tested under RAID 5 configuration in a Windows environment, the Synology RS810+ and DS411+ deliver an average of 112MB/sec reading speed while RS810+ writes at 107MB/sec and DS411+ writes at 106MB/sec.
The 411 looks decent, the other one seems more a professional market. slim, flat shape