Border Collies are very active dogs. I would recommend doing a lot of breed research. If you choose a border collie make sure to have a big yard that is totally enclosed. Also, if you get a border collie you'll have to watch them with your kids if you have any. They are great with kids, but will nip as they try to "herd" them. It is not malicious, but pure instinct.
Find a good quality breeder that will be there for you. Find a high quality feed to feed. Make sure to talk to your local vet to find out their vaccination schedule. Decide what method of training you'll use too.
Crate training is highly recommended.