As a long time lurker, I learned about the REI Headwind pants from this forum, bought them, and really, really like them. I've only had then for a a few months so cannot comment on longevity.

For the record, I tend to get colder more easily than most, and I went for a short 10 mile ride on Sunday in 28F weather, and was nicely warm on my legs.

They are not too tight either.