Interesting topic as I ask myself these same questions. Something else that for me will play a big part in my decision is what sex/personality will fit best into my existing pack. Hopefully, this will correspond to the best puppy????? I currently have a male (neutered) and a female, and it is very important to me that my dogs are part of the family and that everyone gets along. My breeder has 1 male and 3 females and the male keeps everyone in check. They can have as many females over without any problems, but bring in another un-neutered male and there are serious problems - they pretty much have to keep them separated. Another lady I know who shows boxers has 2 un-neutered males and she keeps them separated always. I don't know whetehr everyone has this experience or not? I have heard a lot about 2 females potentially being a bad mix, but not a lot about males. I don't know how much of a difference it makes for a male to be un-neutered, and being used as a stud. So, I think a lot about what the best sex/personality mix would fit best in with my current dogs. This is probably an issue regardless of whether one has a litter of puppies or just buys another show puppy. Star is not yet 2 years, so I haven't even started any of her health tests yet, and I am not in a big rush to breed her - there is so much to learn in the meantime, and the little madam keeps me very busy.... I can't talk to how difficult it is to find a stud dog, since I haven't had to do that yet BUT in my mind it strikes me as a VERY difficult process to go through. Of course, I think that my girl is gorgeous (biased?) and she has a few faults that I would like to correct - so that means I would be looking for a male that I think is just as gorgeous, and without her faults .....hmmmm.....I suspect I am going to be looking for perfection (according to my standards) and not find it. I look closely at all of the males, when I go to dog shows down here in Texas, and I find suprisingly few that I think are really good examples of the breed. I could go on and on....but, I did want to make the point about determining what sex/personality would work best for you, along with picking out the best possible puppy.