7mm mag will work fine for caribou or bear, though for big brown bears I might like a little more so I dont wet my pants.

Now bigbulls, why on earth would you try and talk a man out of buying more guns?lol. 375H&H is a good all around gun, and is alot of fun to shoot. Much more of a push on recoil. You can use lighter bullets for the 'bou, or anything else that walks, or go with the heavier bullets for big'nasty.

Keep your 7mm wsm, reload if you dont yet, or consider a rebarrel to 300 wsm. Then get yourself a 375H&H, and maybe a nice bigbore lever gun in the mix. You can NEVER have too many guns!lol