B.C.
I would go for a double jogger. The baby might not be in it for a while, but at least you wouldn't have to buy a double right after you bought a single. As for brand, I don't know which are best. We have a Baby Jogger brand one and I LOVE it! My husband is 6'5'' and he has pushed it a few times and we've raced with it and he didn't complain. He likes it more than our instep single, since it is higher. They are more expensive than most brands, but if you could find one on used it would definitely be worth it.
Also, if you're really into running, the bigger the wheel diameter and thinner the tire the better. It makes for a better ride and is easier to push. The Baby Jogger also is one piece of aluminum which is A LOT easier to handle. So if you could find a single pieced frame, I would get that one too. Sorry for the information overload. I just really enjoy running :)