I am in MN and use mine year round with no worries of it cracking. If it does crack, it has a lifetime warranty. You paid for a cadillac, you can drive it through the salty winters if you want to. Except BGE will warranty for life instead of a few years.
Seriously, it is a one time purchase, and you are set for life. Do you buy cheap tools? If you know you like grilling, get one that will last a lifetime.
If you don't know how much you will use it, or can't afford it right now, try another style. But be prepared to buy another in the future when you use it more than you thought you would.