Eurgh! RonHill DXBs - and you have to iron them as well!
I've got some Assos Airblock bibtights (not sure what model mine are but the 851 is the current model) - windproof, showerproof, hardwearing, god they are gorgeous. Still, they should be for £130.
I've also got some Newline waterproof thermal running tights - it's like putting on a wetsuit, but they are so waterproof and so warm, haven't tried wearing them for cycling but I guess you could with a pair of shorts underneath. They weren't cheap either - about £50.