Looking to make my first box - input on build appreciated!

I currently have a PC that I use to stream Plex movies and serves as storage as well ( with no real backups.. don't shoot me!) I serve up movies to me locally on my network, as well as to my parents a few states away. That PC currently has an Intel Celeron G530. For my FreeNAS box, I am looking to expand storage so I can fit more media whose primary purpose will mainly be streaming over PLEX.

I made a few impulse buys as part of black friday/cyber monday deals and currently have the current...

Looking to make my first box - input on build appreciated!