4k streaming NAS with trancoding

I am looking into getting a NAS Hard Drive, I like the TVS-473e, TS-453Be, and TS-563.

The TVS I like due to its dual PCIe expansion ports The TS-453Be is very consumer looking, I worry about the plastic trays picking up vibrations. (I was planning on using HGST 8TB helium Enterprise drives)
I like the TS-563 due to it having 5 drive bays at a competitive price. All are x86 I do believe with upgradeable ram.

So……my intended use is to dump all my music and video files here in a raid 5 setup (along with all my program install files, photos, ect.) I have an ASUS 1900AC router and I want to be able to stream 4k video throughout my home. (I would also like it to be able to do this through the 5g network once this becomes available.) (I have three 867AC devices)

Other than that I just need a simple file server for collecting files. A torrent system would be nice too. The more metal parts the better.
The lower the price point I can get to achieve 4k transcoding and streaming the better, but I am not afraid to spend money to get the correct item for the use. I would rather pay a little extra and have it fit my needs for a longer time.

It will be more and more difficult to find metal trays from now on. Everyone seems to switch to plastic quick swap type trays. I would not worry about vibrations especially for under 8 bay solutions. This is more an issue in 8 bay and more NAS models. Even though drives have an anti-vibration function built in. I would recommend getting TS-453b /be it will do transcoding and 4K playback. Alternatively, you can consider DS918+ which will do all this (but has no PCIe slot) and transcode more types of video files. If you still prefer AMD type NAS you should put a video card in the NAS PCIe slot – which will increase the cost.

Find regulary updated NAS offers here
Of course I would prefer you choose AMAZON UK AMAZON USA to buy your perfect solution, however, if you would rather buy locally, please use the links used above to take you to your local Amazon store and help support this free advice service with ad revenue. More ways of supporting the blog are described HERE  
Home: https://www.backblaze.com/cloud-backup.html#af9rgr Business: https://www.backblaze.com/business-backup.html#af9rgr Comparison with other service providers: https://www.backblaze.com/best-online-backup-service.html#af9rgr