So I have a pair of PI Amfib tights...the ones without a chamois. They're OK. Not super comfy, but probably good for the coldest rides I'm likely to do outdoors.

Any other suggestions? I also have Sugoi Sub-Zero tights, which are my favorite for very cold runs. Not sure whether or not they'd be adequate for riding, but I love how they are warm and still stretchy. I've seen people in cyclocross races wear them when it was around freezing. I'd like to be able to ride outdoors when it's maybe as cold as 20...not sure I have the badassery to ride in anything colder than that.

I also have a PI quilted jacket that is VERY warm, even though it's not particularly heavy.