I have been out in -17c in nothing more than 3 thin layers on top - none of them water proof!

If its windy or slight drizzle I will put a thin water proof on, but usually I need to lose a layer underneath so I don't sweat like mad.
Just thought i would post this question to see what people recommend.
What would you guys wear to commute to work (either 15mins or 30mins) when it is tipping it down, windy and cold. I am worried about being wet and then being frozen by a strong cold wind. How can i keep my torso warm and dry ????
When it's really cold, it doesn't tend to be wet.
Layers - multiple thin layers are warmer, easy to regulate (take one off, put one on) and dry out quicker.
If your core body is slightly cold, your toes and feet will suffer first - you don't want to sweat and then be cold due to it, but you want to have a slight sweat on. For 15-30 minutes sweating isn't such an issue though.
Putting on cold/wet clothes is not a good start (yes sometimes it cant be avoided) as it takes heat away from you straight away.
Being wet for 15-30 minutes isn't the end of the world, I wouldn't be bothering with super water proof gloves for that sort of distance. Invest in some overshoes - they aren't water proof, but insulate you. Personally I don't like full overshoes so now I have some half ones (mid season) that only cover the toe and front - its really your own trial and error with this, just make sure you have good blood flow in your feet (read: no big socks or tight shoes).
I have some dhb waterproof trousers - for the last 2 years - I have only worn them once, never again. Better to get your leggings (or legs) wet, legs dry faster than leggings, and generally stay the warmest overall.