I am considering moving from a desktop NAS (I currently have the Synology DS418play) to a 1U. Honestly, I only use my NAS as a file storage box. I know it has a lot of capabilities and app support, but I am not taking advantage of that... Requirements: 1U with 400mm depth limit, and 4 x 3.5" drives. Looking around, seems like my 2 options are the Synology DS819 or the QNAP TS-451DeU. Questions: 1. Am I missing any alternative? 2. Both those 1U NAS are priced at $599 in the US. Seems like technically the QNAP is better. Anyone compared those 2 NAS devices? 3. Should I decide to splurge and move to 2U (still with 400mm depth limit due to my rack) - what would be a better alternative to the above, keeping budget reasonable? (I could not see anything for less than $1200 which is exactly 2x the price...) Thanks!