GT 7595's fly great. Are you shooting fixed or mechanical braodheads. I used the Tru-Fire switchblades last year and they fly just as straight as my field point. I've heard Swacker fly really good too and am thinking about trying them this year.
Something else that needs to be asked are your braosheads and field points the same weight? Are they tuned to your fletchings? With fixed it seems to really matter(found out the hard way just how much it matters