I am just a little taller than your wife and I have a 26". I don't own a bow over 54". I have a bunch of Maddog longbows from 48" to 54". They are all great. I also have several recurves from Mike from 46" to 52". Awsome performance . If you want a take down I would suggest Sierra Blanca bows. I have a 50" and 52" from Jess, based off of the old Rocky Mtn recurve .
You want a bow w/ a low brace height if you have a short draw length so you don't lose power stroke. Any bow with more than a 7 1/2" brace is off my list.