Like you, I have many rifles to choose from, and some are definitely better bear stoppers than the .44 magnum. But what I actually chose to carry is a Rossi M92 Stainless 16" barrel .44 mag. I replaced the rear sight with a blank and replaced the bolt safety with a Steve's Guns peep sight. The peep is quicker to use and more rugged than the original open sights. It has a quick detachable sling. I carry it chamber empty. The magazine is loaded with 8 cartridges, handloads with the Hornady 265gr. bullet and maximum charge of W296. I know that if i was facing a grizzly I would prefer one of my .375H&h rifles, or my 9.3x62, my .45-70 Marlin Guide gun, or my .450-400 3" Nitro express double for that matter. But none of them are as handy, as light, as easy to slip into a pack or on my back. The Rossi goes with me almost always, all around our northern BC bush camp. I have used it to give me the courage to face down or scare away a few bears, but never had to kill one with it yet. I know it will be up to the task, and more to the point, it will be with me, because it is short, 5-1/2 lb. light, reliable, almost maintenance free, quick to use, and holds many cartridges. Compared to my Sako Kodiak .375 H&H it's not much of a bear rifle. But it will be with me, and in my hands in a flash if needed. Life's full of compromises. I recommend the Rossi .44.
Just for comparison, I also tried a Marlin 1894 stainless .44 mag, 20" barrel and still have a Marlin 1895 Guide gun 18.5" .45-70. The Guide gun is the only other gun I'd consider for this work, but for me the trimmer, lighter Rossi beat it for the final cut.