Hands down I think that M3's are a much better car than a Z. When you're talking 25-30k more though, that is almost double the price of a Z. I think we have one of the best sport cars for the price. It costs less than the difference to boost a 370 though. I think that would be a great option, unless you can get that gtr you mentioned. Both cars will probably be amazing though to be honest.
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