Great article!!! thank you Stephane!
It is true that you better keep your food inside of your tent when it is really cold, I woke up once with frozen bananas, frozen water, frozen yogurt... not great for breakfast! It happens once and then you'll remember it!
The Sea to Summit reactor is also an excellent product. I am able to use my 3-season sleeping bag to do winter camping.
The only thing I would not agree with is the choice of the Schwalbe Extreme. It is indeed a good tire off road but it is not as durable as the dureme or the marathon XR. So if your trip is not too long I guess it is ok otherwise I would suggest to go with something more durable.