They do look good. Though, I think aimed at business. So probably some upcharge.
https://www.amazon.com/Lenovo-ThinkCentre-Tiny-Desktop-Mini/...
Excellent because of the quality of their BIOS/Firmware. You can throw anything at them, and it just runs without errors.
Even most exotic stuff like https://genode.org , not to speak of any *BSD, Solaris-derivative, or some Linux.
Suspend to RAM, and successfully waking up from that works every single time, without special setup, no matter where and what.
Hibernation/Suspend to disk is up to you and the setup, but no problems there, either.
Rock solid experience even with the 'most riced' kernels and userland by https://cachyos.org running Plasma/KDE on 'oh noez! BTRFS!1!1!!'
If the number of ports and their speed is enough, they are good for homelabbing and even casual desktop-use. Expansion not so much, except via USB3. (5Gb/s only)
I know nothing about later models, but these are more than enough for my uses.
Very stress free.
Another alternative is BeeLink's S12 series, which accept 2.5" SATA drives and M2 NVMe drives. However, the NVMe port on these systems are x1.
Both are silent (for active cooling), dependable systems, but not as silent and small as a passively cooled RPi5.