I have been using Muzzy 100gr 3 blade for several years now. They are very tough and work great. They do fly a little different than your practice points. They make them in 125gr as well. I would say to stay shooting the same weight broadhead as you have been using in field points.
My buddies have talked me into trying the new Rage broadheads. They are mechanical and fly very similar to the field points. The one Pronghorn I have seen shot with one was very impressive, and died quickly. My two complaints are they are expensive, and the one I shot and missed with was destroyed by a rock. It would have probably broken any broadhead, but at the price, it was disheartening.

For bows, make sure you shoot them a few times before buying. I favor the larger grips because I have larger hands. I tried a Hoyt Vipertech for a few weeks, but found the grip was too small and not balancing in my hand properly. I shot one arrow out of a Matthews SQ2 and bought the bow. It is very comfortable and easy for me to shoot.