Ridge yi/yo is best producer of available quality Zin.
Martinelli is probably the best less available quality name, which I hope to get my hands on.
97 is better than 99 which has disappointed me. However many 00 are awful in comparison. More and more this varietal tastes like a disjointed fruit bomb. The best 99 I've had are the Hendry's both blocks; interestingly unrated ? not tasted by WS/WA