When I got my Ninja XL, I gave my 5-in-1 to a friend and I have deeply regretted it ever since. I do like the XL, but I really liked the 5-in-1 because it's so much deeper. It was easier to do whole chickens, turkey breasts, etc than it is in the XL.
If I could find the 5-in-1 for a good price, I would buy it. And use both of them. They each have good qualities and make it worthwhile for me to have both.
A friend found one at a thrift store for $30. She's going to try it and, if she doesn't like it, I will buy it from her. I feel badly because I don't want her to like it!