Yes, I support responsible breeders.
Like Orangutango said, it's not their fault dogs are ending up in shelters due to irresponsible owners and/or breeders. In fact, most responsible breeders also work in rescue.

Both of my dogs came from BYB's, and I will never make that "mistake" again.. but, I don't regret getting either of them.

I keep in contact with my (hopefully) future Collie breeder, as I plan/hope to bring in another pup within the next few years or so. I'm also in the process of searching for a Golden Retriever breeder whom I can keep in contact with for the future.