I was about to order that GMKtek G9 and then saw Jeff's video about it on the same day. All those issues, even with the later fixes he showed, are a big no-no for me. Instead, I went with a Odroid H4-Ultra with an Intel N305, 48GB Crucial DDR5 and 4x4TB Samsung 990 Evo SSDs (low-power usage) + a 2TB SATA SSD to boot from. Yes, the SSDs are way overkill and pretty expensive at $239 per Samsung 990 Evo (got them with a deal at Amazon). It's running TrueNAS. I am somewhat space-limited with this system, didn't want spinning disks (as the whole house slightly shakes when pickup or trash trucks pass by), wanted a fun project and I also wanted to go as small as possible.

No issues so far. The system is completely stable. Though, I did add a separate fan at the bottom of the Odroid case to help cool the NVMe SSDs. Even with the single lane of PCIe, the 2.5gbit/s networking gets maxed out. Maybe I could try bonding the 2 networking ports but I don't have any client devices that could use it.

I had an eye on the Beelink ME Mini too, but I don't think the NVMe disks are sufficiently cooled under load, especially on the outer side of the disks.