I like the 243. With good bullets it kills white tails and even black bear really well. I've shot a lot of deer with the 95 grain BT and the 100 grain Partition. Most of the deer were in Northern NY so bucks went from 140 up to 200 dressed. With the great bullets available it'll do the job.
Both of the others are great as well but for a dual purpose cartridge a 243 is pretty danged good.
Both of the others are great as well but for a dual purpose cartridge a 243 is pretty danged good.