RE: What caliber would you prefer?
You need an "any of them" choice because inside 100 yards I wouldn't care one way or the other.
They all will have more than enough energy at 100 yardsto kill any deer.
The difference intrajectory, from the fastest to slowest,zeroed at100 yards will be nothing. A 150 grain 30-30 will be.3" high at 75 yards and the .243 with a 100 grain bullet will be .1" high at 85 yards.