Here I thought this would be an argument, don't ever put a guys broadhead down. You probably be better off to run over his dog or sleep with his wife.
To the OP: most any decent quality broadhead can shoot really close to field points, I'll admit that it likely isn't exact throughout 75 yards or so because of the increased resistance from the blades. However the margin is so slight that it will likely fall within a deviation number of a half dozen or dozen arrows so for all practical purposes, they will fly the same at hunting distance.
Pick a broadhead on criteria that you think is important, fortunately there's lots of good ones anymore, but some bad as well. You will find most of it will come down to your bow tune, not the broadhead.
Iron Will, Magnus, Qad Exodus, wack'em, spitfire, and slick trick are all heads I have used and would recommend.
To keep from offending I won't list any that I wouldn't use, and the list I'd use isn't all encompassing. Lots of good heads out there I'm certain I haven't had personal experience with.