Wait 6 months and get an Evoque if you think you need one.
We used a Freelander last Christmas, properly kitted up - we use aggressive (and noisy) all terrain winter tyres (designed for snow and mud) all year round. Even then you could happily light up all four wheels, do subtle, controlled four wheel drifts and so on on REALLY bad roads - the ones where the was a 100mm high curb formed along the centre of the white lines where people hadn't driven.
It was almost completely unstoppable. But Joe Public wasn't, and he caused absolute CHAOS with his inability to drive to the conditions - that's the bigger problem imo. A 4x4 can't get the motorway to magically reopen, so you're still going to hit problems trying to do a serious mileage in that weather.
That type of M&S tyre isn't as well suited to the snow as a specific winter snow tyre though, isn't it just the large open treads which gain it such a rating.
The tyres fitted to the Land Rovers at work are M&S rated, but weren't comparable in the snow to a specific winter tyre.