In reply to Philo22:
I think the Blade would be too small and "coffin like" for winter use. The steep, sloping sides mean it would be very difficult not to touch the sides, and getting in and out isn't that easy.
The Banshee, or maybe Zenith, would be a better bet. Possibly also look at the Wild Country Zephyros.
Hilleberg Soulo looks excellent, but a little over budget...
These little tents can be quite prone to condensation, and with little space to put wet gear too, I'd tend to go bigger in winter despite the size & weight penalty, or you'll possibly just end up cold, damp and miserable for the long dark nights.