If she is very forward and you think you may have to use the bridle quite a bit to slow her (I use my weight mostly on Shay but there are times when going downhill through the woods and he is getting excited that I need to use my reins) maybe the dr cook wouldn't suit, as I have found from my own experience, that these tend to be the horses who then learn to lean on the dr cook.
I have had very good experiences with the LG bridle (flower hackamore from marylot is similar) which allows you to change the way it is buckled to give different pressures, so you can set it up as a sidepull, you can set it up so it gives nose pressure and hardly any curb, you can set it up kicking the curb in quite quickly, so you can choose what your horse prefers. I have mine set up as a hackamore (you can also buy shanks for the LG) with more nose pressure, and then if I lift my hands the curb comes into play.