Some really good suggestions above, except maybe the Stinger Buzzcut (explanation later). I think the better choice, if you are new and aren't sure about sharpening are the Stinger 150 grain, 2 blade (not buzzcut).
Schmidty3, here is the explanation, it is not mine as I am no expert. From "The Archery Bible" by Fred Bear page 73, right column, second paragraph:
"Serrated and sawtooth edges on a broadhead should be avoided. While they look wicked, actually the teeth fill with hair, tallow and tissue and thus impede clean cutting and penetration"
Others use them and say they produce good results though. FWIW Fred Bear also said to use 4-blade heads and stay away from 2 blades on the opposite page so YMMV.