FirstGear/ Warm&Safe jacket liner and carbon gloves, and a single controller - I never thought I'd ever use them but since that one cold day, I'm now a covert... that or I'm getting old.
The warmth without the bulk. Prior to that I've always ridden all the way down to -5 degrees C (23 degrees F) without an issue but it's always the hands and fingers that suffer the most... I'm going to try to get the pant liner and the heated socks from Gerbing since their compatible.