What can I say about Burton's AK 3L Hover Jacket? This jacket delivers in extreme conditions! The jacket has no insulation and I've used it with a fleece pullover over a t-shirt over a long T and I was warm and dry when I was shreding at Seven Springs weeks ago. But, I seriously think the BK Insulator Jacket works even better when worn under this jacket. The vents in the back are so awesome for snowboarding, even better than pit vents.
The price is a steep but you have to pay for both purpose and fashion.