I decided several years ago that "it" is what you shoot well and have confidence in. I carry a 40 S&W, my bedside piece is a 45ACP, and my "shop security" is a Smith model 19. I shoot them all reasonably well and feel safe in the knowledge that they are "there".
I feel the same way about long guns. I've never felt the need for a "magnum" rifle. The rifles I shoot I have confidence in and I also shoot them reasonably well. I can't worry about what others "think is best" or like or dislike. It's not worth argument or debate,
GOOD LUCK and GOOD SHOOTING!!!