e46 diff ratio

so guys got a 323 e46 and was wondering what higher/better ratio diff i can put in, like i did with my e36, I've seen some people use X3 diff with either 3.91 3.64 3.73 ratio but there hard to find. whats the best ratio out of a standard e46? also whats the strongest shafts to use as dont fancy snapping them every drift day?
 
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