Are you set on Switzerland? As Sam notes, even within that domain, there are lots of
choices. But there are lots of options in France, Austria, Italy as well.
Assuming you are from the US, I would say that your primary reason for going to Europe
to ski is not skiing. It's for the ambiance, food, wine, and, if you work it right, cost savings.
Given climate change, the snow conditions by mid-March in the Alps can be variable.
I will say while the views in Zermatt are iconic and everyone wants to ski into Cervinia to
say they did it, the lift infrastructure is more sparse than you would expect.