New Build for Plex transcoding. Can you comment?

Hi! how are you?

I'm planning to build a FreeNAS rig intended for store my important data and also for media files and transcoding with jailed Plex.

I am choosing a motherboard not listed in the recommended hardware but, what do you think about that particular component?

Chassis: Fractal Node 304
Motherboard: ASRock...

New Build for Plex transcoding. Can you comment?