The thing is, even buying a dog with certified bloodlines, being vetted out by the breeder (signing a contract etc) and all that, doesn't guarantee a perfectly healthy dog, or the temperament. It might increase your chances, but there are no guarantees. Been there and done that with a very well bred golden who had heart failure at 7 - it turned out that out of the whole litter he was the only that that wasn't a total spaz.(Golden)

Certainly it's a personal decision. My experience with purebred rescue is that the dogs are full of love: they know you are the new owner and they love you for giving them a second chance.
I've done breed rescues for Malemute and Goldens.