Rifle: Marlin 1895 in 45/70 (although I wouldn't mind a .44 magnum)
Handgun: A S&W 629 with six inch barrel (a model 27 in .357 would do, too)
Shotgun: A Winchester 1897 trench gun would be sweet, I love the exposed hammer and the bayonet lug (probably useless, but cool as hell).
Basically, any decent lever action rifle, double action wheelgun in a good calibre and well made pump action shotgun would be all I probably need.
Now hatred is by far the longest pleasure;
Men love in haste, but they detest at leisure.
- Lord Byron (George Gordon Noel Byron), Don Juan
(canto XII, st. 6)