I am 100% for G-tex stuff. I used it for climbing, sailing and anything else that requires being dry and warm while it is hell outside.
Under, we will use very (so I will guess) hi-tec wear - my fave is the climbing stuff from MASER, but my first mate uses Helly Hansen Lifa and she swears by it.
Second layer we will use fleece (Polartec). More than one, if it is cold.
I like to use Windstopper (again G-tex) on top when it is dry and I only need protection from the wind