There is nothing wrong with shooting a r/s two blade head. You'll actually get better pentatration with it over any r/s three blade head, in larger big game animals.
I shoot WW three blades and have no problem getting them razor sharp. I've shot Snuffer's in the past and also had no problem getting them razor sharp---ya just have to work at them a bit longer. I do prefer the WW head and have had complete pass-through's on elk and deer with them. Excellent blood trails too. Whatever head you choose, keep it razor sharp and pick your shots.