Who has experience with Supermicro motherboards and Proxmox

Good day,

We want to start a Proxmox virtualization in our firm.
Here, the proposed hardware for about 12 virtual servers and HA:
- 2 x 6 core Xeons per host
- 128 gig Ram Per Host
- 10 TB NAS (I-SCSI 10GB on-Lan)

Someone already has experience with a similar configuration?
Which motherboard (manufacturer, type and bios would be great) would you recommend?
Is there a database / list of already tested hardware?

Thank you in advance for your effort