It just depends on what you are looking for. Personally, I wouldn't leave some large rack on the decoy just because some bucks just aren't big fighters. Supposedly a half-racked buck is the optimum as far as buck decoys go because it isn't very impressive looking and they will feel confident that they can kick his butt (at least that is the theory). A doe decoy has obvious advantages during the rut.

I chose the half-racked set up just because I wanted a show, and I have to admit it was a lot of fun to see that little buck swell himself up and strut around.