I have read great reviews about Togz!!! I have the fleece lined trespass one, seems quite good though it does let water in on the shoulder seams...my DD does go to an outdoor nursery though so she had been outdoors for about 4 hrs in the rain!
Trespass ones are great and they have a half price sale on too. We have the thin puddlesuits, but they do a fleecelined one too which looks warm. The kids love them because we can go to the park in the wet and they stay warm and dry.