I've killed the most stuff with two blade Zwickey Deltas. I could be happy with them for the rest of my life, but I shot a doe with a Simmons Tigershark this fall and I was very impressed with the performance and blood trail. I'm going to try them on a buck next. They may be my next favorite broadhead. I find them easy to sharpen, but you need different equipment. A 6" mill bastard file will do the trick on Deltas, but for the Simmons, I start with a chainsaw file and finish with a Jewelstick diamond file. They are easy to touch up with the jewelstick.