littleal,
5-shot is the resident expert on this subject and he will be able to give you the best advice. Here is some but not all of his broadhead tests....
http://www.american-hunter.com/broad...dhead_test.htm
Depending on your set-up there a bunch to choose from that would get the job done. Magnus Stinger, Zwickey' s, Bear Razorheads.
I am going to be using Phantoms this fall on Moose, Whitetail, and Black Bear. They can be shot with just the main blade(at 105 gr) or you can add a one-piece 2-blade bleeder(at 125 gr) to have a total of 4 blades. I have been testing these Phantoms out for the past month and so far the only complaint is I broke the retaining tab on one of the main blades when it was hit by another arrow in the target. Other than that they fly nice(5 inch fletch on 400 gr Gold Tip Camo XT), no hiss, and the steel used in them is top notch. After dozens of shots into foam target the blades still held a pretty good edge.
P.S
A friend of mine shot a large Cow moose last year at 30 yards with a 3 blade Thunderhead and he got a pass through. This was out of a 60 pound bow and 28 inch draw. So as long as shot placement is good i dont think you will have a problem with any QUALITY fixed blade broadhead.
Good Luck and happy Swamp Donkey hunting.