With the guillotine be sure your insert sits well in front of your riser while you are at full draw before you buy them. If your arrows are long enough, and your bow is already tuned you should have no problem with either of those heads. I'd buy extra so I could practice and make sure though.
The local archery guru suggested that I use the same broadheads that I hunt big game with--but, use a set that has small notches filed into each of the blades that will pick up feathers as it penetrates so the arrow expends its energy into the bird rather than just zipping through. There are several reasons this is advantageous. First, a bird with an arrow stuck in it can't move as well and won't go as far. Second, if the arrow knocks him down, it gives you a chance to get up and grab it before it runs off. Doing this also makes your arrows easier to find, reduces the chance that a pass through will glance off at some odd angle and into another bird, and you won't have to worry about re-tuning your bow if it's already set up for that broadhead.