RE: what broadhead do you suggest??
With your setup you could shoot most any head of reasonable size. tune your bow properly and pick a quality head. their are by far more good ones than bad ones. I prefer Muzzy heads, but rocky mtn heads are great as well as thunderheads, steel force, Magnus, wasp, golden key heads, rockets, Slick tricks, Vortex and the list goes on and on. I can say though that I would stay away from any broadhead made by Sattilite, as well as those "cheap" heads. useualy recomend a 3 or 4 blade, replaceable fixed blade head. Ones made by the above manufactures will work great out of a well tuned setup.
TAKE YOUR KIDS HUNTING AND YOU WON'T BE HUNTING FOR YOUR KIDS