I have 8-10 rides with TOBE bib pants, they are great, light & stay warm/dry. I looked at KLIM bib's first but the fabric on the KLIM's seemed heavier and kind of rough and crunchy, the TOBE are more of a smooth wetsuit feel fabric.
I do Larry usually a thicker fleece or a hoodie but have yet to pull it out. And have ridden locally at -30 tearin through fields
Thanks!Personally, I wear a thin wool shirt underneath my arcteryx jacket. Wool is a magical material. The air pockets created by it keep you warm without having a lot of bulk. On the off chance you do get wet, the wool will keep you warm while wet. It takes a while for the wool to dry but it won't sap the heat out of your body. The jacket overtop is great. It's thin and light. I have a friend working for a clothing store and he was able to get me the jacket for 200 dollars which worked awesome for me. Plus arcteryx has a pretty awesome warranty. I pack a fleece sweater with me in my bag on the really cold days. I find I can regulate my temperature perfectly though just by opening and closing the vents under my arms.