Zin Maturation

[MontereyRick]

I've learned recently that Zins in general, due to the makeup of the fruit, don't store as long as Cabs.

When do decent quality Zins mature. For example, I have a case of both the 99 and 2000 A. Rafanelli Zins in my cellar. When would they be at their peak and what is the general rule with regard to cellaring Zins?

Thanks in advance.