In that weight range, I would go with the Magnus as well. I've checked out the Sonics, and I just don't like them, can't really put my finger on it, but they just don't do it for me. Plus, with the 85 grain Magnus, you still get a good cutting diameter. If you are looking to go up to 100 grains, I think the Muzzy Phantom is the best COC head out there right now. Any reason you are stuck at 85 grains?