I would use I-80. I think he is a real good bull and has the genetics to throw you a nice calf at a low birth weight. Bred to your heatwave heifer i would look for a pretty dang nice calf.
Nice looking heifer, looks good should do well as a show heifer and should have some good calves in the future. I have seen some pretty good calves out of Q-Dog.
I looked Stands Alone he looks very cool should gets some very goods calves out of him if bred to the right cows. I also like I-80. Walks Aloneis one of my favorit bulls, yeah he is short but he is thick, sound, and very stylish. Have seen some very good calves out of him already.