How do I educate my wife on Shaving Brushes for Christmas?

The Wife unit wants to buy me a shaving brush for Christmas. I’ve just recently changed from using shave gel to soap and brush (A very good move I might add) I am using a boar bristle brush and have been learning about Badger brushes which are supposed to be superior. But I am still learning about making a satisfactory lather. Maybe I should ask her to get me something else and I will get the brush myself when I’m ready for it? I don’t want to appear to her like I’m obsessive because I’m really interested, but don’t know enough to give her any guidance of what I want. How do I walk that razor edge?