I agree with Terry on this. I have had pass thrus on deer, caribou, black bear and a hog shooting 3 blades from bows in the 47#-55# range at my 28" draw. Right now I prefer the VPA heads. Seems some folks do have issues with sharpening the VPAs or the Woodsmans, Snuffers etc. but for me, once I learned to use light pressure, they are easier to sharpen than a 2 blade head. That being said, use the ones that you can get the sharpest!
By the way, there are some good tutorials on 3 blade sharpening both on this site and youtube.