Yes, there are many snow tires for the X5. You can find a lot of them here:
http://www.tirerack.com/tires/Compar...=S&search=true
It will handle very well in the snow, and probably much better than your Jeep, since it is equipped with DTC and DSC and an intelligent AWD.
What I meant was how does your wife make it through all the snow in her car?