Winter-proofing your bicycle & Winter bike maintenance

has anyone tried winter boots? I looked at the Sidi's but they seemed to be really over-priced and to use their old tech. Reviews also suggested they let water in the top which would defeat the point a bit.

I have some northwave winter boots, they are great in general wet and snow conditions, however in the pissing rain, they do let eventually let water in - and being waterproof - they keep water in - it's the old Sealskinz syndrome.
They are also pretty heavy. However I still wear them in the winter.