May be ordering a '09 X5 30i

[WannaX5]

I currently have an '08 535i, and it is being lemmoned. I would really like to get an X5 (probably should have gotten that to begin with). I already have all my options picked out and would like some advice. We live in Los Angeles, so we don't deal with crazy weather here. But we do own a home in the mountains that we go to 1-2 times a month, and in the winter there can be some very bad road conditions. For this reason, I have decided against the sport package but now I am questioning my decision. Is there a reason to not get the sport package due to weather conditions, or does it not make a difference? Are the tires on the sport package still decent tires for snow?

Thanks in advance for your advice.