I know you have said you were not inquirying about the age to get your puppy but I just have to say...
I contribute ALOT of my dogs GREAT behaviour to the fact they were with there mom until 9 weeks. I have seen other puppies that were taken sooner and as stated before problems like nippping are an issue with MOST pups that are taken sooner. It is hard to wait I understand but in the long run it will save you so many frustrations. Please atleast think about it