With your draw weight, length and TAW, you can shoot pretty much any head you want to and expect dead deer with 2 holes on most shots. The only reason to change head weight is if you are chasing an FOC percentage or for tuning reasons and 5 grains isnt going to generally have any impact in either scenario unless you are an elite level tuner/shooter like Levi Morgan, John Demmer or the likes. Given the option to choose between Muzzy and QAD, I am choosing the QAD 100% of the time. It is just a better head in construction and flight. Muzzy's will without question kill deer though and have been for a very long time. I would not compare those heads to high end fixed blade heads though, 2 entirely different critters. The comparison for fixed blade heads comes down to build quality, steel type, sharpness, edge retention, etc. For example you could compare the VPA 3 bade with Woodsman 3 blade. The VPA is a far superior head in build quality. A different reasonable comparison would be Cutthroat 2 blade with the iron will or Daysix heads. All three are well built heads that fly really well. The biggest difference is in the steel choice used by each and how well they will hold an edge, ease of sharpening, durability to heavy bone hits. We first need to decide what we want in a head then make our comparison across comparable heads that fit our criteria. Comparing a mechanical and an iron will just doesnt make any sense, at least to me.