Optimal mount options for Proxmox?

Are those below the optimal mount options for Proxmox?
I see posts that claim ext3 is better,faster and some other posts contain options such as rw and realtime.
What are the recommended ones, from Proxmox staff?

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cat /etc/fstab

proc /proc proc defaults 0 0
none /dev/pts devpts gid=5,mode=620 0 0
/dev/md/0 /boot ext3 defaults 0 0
# /dev/md/1 belongs to LVM volume group 'vg0'
# /dev/md/2 belongs to LVM volume group 'vg1'
/dev/vg0/swap swap swap defaults 0 0
/dev/vg0/root / ext4 defaults 0 0
/dev/vg0/backup /backup ext4 defaults 0 0
/dev/vg0/data /vz ext4 defaults 0 0
/dev/vg1/backup2 /opt ext4 defaults 0 0

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Thank you