That is a tough one. You will want to stay calving ease as much as possible. I'm not sure how people are getting along with calving ease on TM Gus but he is one that comes to mind. Also, if you are thinking of a black bull, I like BEB Juneau for calving ease and his fronts aren't too bad. I would suggest ALM Chiller but he is a Sonny son like Aviator. We have had success with him on calving ease and he puts clean fronts on them.