Ya, don't ya love it when guy's feel the need to change the topic to a "their favorite" issue? :
I'd opt for the 243, I guess just because they can shoot a smaller bullet faster (that equals flat). It's my opinion the 243 is a bit small for the whitetail here in MN but alot of folks use them. It IS, I guess, all about the bullet choice and learning/knowing your gun.
I see your new here so welcome, I also hope your a loader because that's the way most folks think about when choosing a cal on a forum like this. Buying factory ammo for any of the listed cals can change the game plan.