I would like your thoughts. I have three 35cm birkins (gold togo, box rouge H and Ebene evercalf) and three 32cm kelly's (swift etoupe, box noisette, combo black box). I'm looking for a smaller bag which easily would convert to an evening bag if I want to. What kind of leather would you choose? would you choose a 25 cm Birkin or 28 cm Kelly. (I'm completely biased. Love both the birkin and kelly equally).