Hi Matt. I've been playing drums for about 25 years, most of it loud and I've only ever cracked three cymbals. Two of those were thin crashes, (Paiste 602 & 12' K splash), the other was a 14' K Crash. If you hit a Cymbal square on it's edge, and you hit it hard, it will probably break. If, however, you learn to give it a, sort of glancing blow, as if you were trying to spin the thing, on it's stand, you will probably find it lasts for years!! I doubt whether your cracking is temperature related, unless you live in Alaska. Zildjian actually used to have diagrams, in their catalogues, indicating how best to approach the hitting of Cymbals, not anymore I don't think. I would'nt be surprised if you told me that you played heavy rock, (Bizkit/Korn/Slayer Etc..), and that you used big sticks!! If that's the case, scrape some money together and get some 'Z Custom' Crashes, they are made to take a hammering, (the original 'Z' range were so thick and heavy that THEY broke your sticks!! they were discontinued because they were TOO heavy and wouldn't make enough noise when you hit them!! - Check out the bottom cymbal on a pair of 'K/Z' Hi-hats - You'll see what I mean

Changing to another make is unlikely to alter anything - there's only a little varation in the way they're made - by anyone. Hope the info is useful. Best wishes