If you are using the gun for hiking size and weight will make a big difference. If protection from bears is all you are after then maby consider a big bore revolver. You can get a ruger redhawk or similar for around the same price as the marlin guide gun.
S&W 5906 9mm, FN commercial Mauser .270 win, Winchester 94 .30-30, Ruger Redhawk .44 mag, Ruger 10/22 .22lr, Ruger P-95 9mm, Savage 110 .30-06, Norinco SKS 7.62x39mm
I support our constitutional right to arm bears.