I haven't made up my mind yet. I'm leaning more towards breeder at this point, but it totally depends if I feel like dealing with a puppy again (still unsure about it). If not, I'll probably look at adults from breeders, then rescue.
I think I'd really love the whole experience of dealing with a reputable breeder. All of our dogs have come from pretty crappy places, and then we have one rescue. So it's something I'd like to experience... knowing my dogs parents, grandparents, etc, and having the support of a breeder throughout the dogs life if needed.