Weeeellll, since no one has mentioned them...The Ashby single bevels for me. Haven't killed any deer with them yet, but I've killed probably 20 somthing hogs with'em. They are a revelation when it comes to penetration, of course, before I had them I used Zwickey's for 15yrs or so... they worked great too. The reason for lots of different broadheads is there are lots of different bowhunters. Pick the one you like, make scary sharp and go smoke a pig or thirty. It works for me. The Ashbys are currently my favorite though.
-Hillbilly