How warm jacket and pants do I want?
This sounds like a trick question, right? Well, actually not. Ski and snowboard jackets and pants are available in a variety of different weights. If you are someone who typically runs really hot go with a shell ski jacket and pants and layers which you take off or put on if you get cold or hot. If you get cold easily consider a heavy insulated jacket. A normal ski or snowboard jacket or pant usually has medium insulation.
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Shell jackets and pants
Shell ski jackets and pants are entirely uninsulated or very lightly lined. The most technical garments usually are shell jackets and pants which give you the most versatility for layering as you can add as many or as few layers as you like underneath. For ski touring and splitboarding shell jackets are the best – as you can get really warm quickly.
I always layer up, merino base layer, insulator, then a gore-tex shell jacket. If you get too hot you can always take off a layer.