Are there any good double strollers for an infant and 3 yr old?

I was thinking about buying a double stroller because I have a 3 yr old and I'm pregnant with my second child. However my 3yr. old is 33lbs,39in. and I'm not too sure if that's too big for a double stroller. My husband thinks that I don't need the double stroller but I do because our daughter has a disability and her legs get weak easily and if I am by myself I will not be able to hold her and push the new baby in a stroller at the same time. So I think that it will be very useful the other thing that we are looking at is the fact that we don't want it to be too bulky does any one have any ideas?