What I would recommend is the one that you have been using for hunting already. If you have the confidence in that BH and you have prior experience with taking animals with this head and have been pleased with the results, then by all means use it. It is not the make or style of BH, it is your confidence in that head and your equipment along with it's sharpness and proper shot placement.
With that being said, I have been shooting a long time, 40+ years, and i have also been a tinkerer for that long, trying and testing out different BH's and accessories. The best flying and best penetrating BH I have found in all those years has been the Smoke Ramcat, a 3 blade fixed head that flies like a dart, is super sharp and cuts some wicked holes. My Warthog, Tsessebe, Impala, Waterbuck and Zebra from 2010 can all attest to that. My 345" 6x7 Elk from Colorado this past Sept can also attest to the effectiveness of the Smoke Ramcat. 2 pass thrus on this 1000# bull elk at 38 yards and 44 yards. It will take one heck of a BH to make me take the Ramcat out of my quiver.