I didn't know they had a debian based version. But I'm used to doing all stuff via CLI now. ZFS is super easy to manage via CLI.got it, makes sense. I was going to suggest truenas scale (debian based).
Case is still hot. Found that a Cooler Master 120mm doesn't cause the mobo to freak out over fan RPM. So stealing sswilson's idea for the 120mm fan adapter for the back. Then I'll be throwing in an NBM 80mm 1.4A fan up front. Which will run @ full speed.