First off, NO! Please dont get 2puppies! Even the most experienced person would find it a challenge and it often ends in heartache. Any breeder worth their salt would definately not sell you two puppies.
All those breeds are very different. I have a lab, grown up with them, always had them and they are versatile, fun loving and do well with families. I must stress to buy from a reputable breeder who has done all the health checks for real. Also i would suggest being cautious about chocolates, they can be as much work as a BC and are known to have aggression issues. I had the worlds best chocolate labrador, she was so laid back and motherly. But, she was from excellent stock, and not bred for her colour.
Im not too up on goldies but from my experience of them they're loopy! LOL!
Border collies arent my kind of dog but if you choose this breed please dont buy from a farm or working stock. These types of dogs need a lot of mental stimulation, they're literally bred to work. If they dont get this, they can develop serious issues, like OCDs, noise phobias and herding and nipping people.
Try this to see what it comes up with
http://www.petplanet.co.uk/select_a_breed.asp