Hi, Mike - - -
I'm another one who's often thought of a separate set of wheels for our '98 V70XC, but have never pursued that thought. We're talking about four winters past and another starting. Never a problem.
This car, of course, has the original viscous coupling variety of AWD. It has proved its value more than once, after an initial proof that it could operate when we were at higher elevations getting our Christmas tree the year it was new. The system just dug four nice little holes in the too-soft snow that I blundered into. A more aggressive tread might well have saved the day, but AAA did the job just fine.
Bottom line: If really heavy snow is in your future, you might want to think twice, but the Salesman probably called it right when he noted the chunky tread of your Pirellis.
bob noble Reno, NV, USA