think all will do the job as good as another, its the eagerness, haven't owned a cocker but heard alot of stories that they will only bramble bash if something is there, where as a springer will do it anyway...
Both breeds are great with children, but cockers are supposed to be the easier of the two breeds to switch off and settle in the house.
I would go with what you like most, aswell as them being out of bramble bashers..
Dell I am itching to see the strain you keep, my bitch is fairly small also, and she has a huge thirst for bramble i can't keep her out of them, your line is