Personally I shoot fairly heavy aluminums. Carbons are fine too, if that's what you like. IMO, it doesn't matter which I'm shooting.....the broadhead is cutting a good sized hole, and the shaft just follows through. Live animals aren't made of foam.
It becomes a point of how far in the ground do you want your arrow to stick, after the passthrough.

Taz is right....it's a never ending arguement, just like the fixed vs. mechanical debate....(fixed of course <img src=icon_smile_wink.gif border=0 align=middle><img src=icon_smile_big.gif border=0 align=middle>)