Which RAID is best for KVM?

Question

RAID

There is a server with an LSI controller and 8 HDDs of 1Tb each (there is 2HDD for the system)
The server is planned for virtual machines under KVM (ubuntu or proxmox)
Which RAID 5 or 6 would be better for this business?
Maybe there are some fine RAID settings for this case?
PS added:
What is planned to deploy?
Mailer (postfix), with access to mail accounts via NFS
Web server (linix), admin panel ISPConfig
Proxy server - unix + squid + sams
Corporate cloud based on ownCloud (NFS)
A couple of servers for monitoring (zabbix, glpi, controller for wifi)
something like this ...

Answer 1

rail 6.

Answer 2

RAID6 is a big performance loss, I would choose RAID5 if the project is on a budget and there are no funds for RAID10

Answer 3

what kind of virtual machines will be spinning? Not a DB case?

Answer 4

I would also use raid5, BUT it would not be bad to really know what exactly will be spinning on it, because according to the technical specification, something else can be applied.