Lulu, agreed 100%, I would never had a border collie in a house block. We had one once, when we lived on 40 acres, and sometimes that seemed barely enough PMSL. She'd run like a rocket!

Thanks everyone LOL I pretty much got the answers i thought i would... every breed has pros and cons lol.

Thanks for the advice on choosing a breed, will have a look at some with Shel. I'll let you know what we decide