I will descent on the popular opinion. Yes, if I wanted a second pup, and did not want a second female, as that can get ugly regardless of the lines, or the amount of research you do, I would get a male, and I would get a male that suited my purposes, like the female, and also would complement the female at least on paper. I certainly would not go out of my way to bring an opposite sex dog in that would be a disaster if bred to my female.
Just because you have a male whose pedigree looks to complement your female, does not mean you need to use him as a stud. But the possibilities in the event of a lack of vigilance on the part of the owners, pet sitter, brother-in-law's nephew, and you have puppies that could be just fine.
The chances that a puppy selected at eight weeks to complement a bitch, truly complementing her when he is mature are pretty slim, and if he does, and has correct temperament, titles, etc, chances are his hips or elbows won't check, or something worse. Breeding may be an art and a science, but I think that some of it is up to luck or chance or fate or nature or our higher power. The super-duper double world sieger son may be awesome in every way, but not produce a sperm that can fertilize an egg, but the rangy, mangy border collie mix from down the road will produce 14 puppies with just one tie, and climb three fences to accomplish it.
If you are going to have male and female in the same household, yeah, I would definitely want them to look good on paper.
Jenna, RN CGC & Babs, CD RA CGC HIC
Heidi, RA CGC
SG3 Odessa, SchH1, Kkl1, AD
Ninja, RN CGC & Milla, RN CGC
Joy, Star Puppy, RN CGC
Dolly CGC & Bear CGC