Hmm...I see your dilemma. I would personally get the boy, mainly because, like you, I've wanted it for a while but have always hesitated due to the price and its possible longevity. Now I am convinced it's a keeper and have peace with the fabric lining, but the price...that I still wrestle with. Now I like to make a list of items I want and I number them according to their desirability and importance/use in my closet. That way, when I see something I want, I check the list and remind myself not to get sidetracked. So for example, while I cannot buy a bag now (funds tied up with buying a house), I know there are only two left on my wish list (Boy and Hermes Evelyne). I am sticking to classics or items that I know I want eventually and staying focused, although it's hard.
Good luck!