I'm having a hard time choosing the right key holder.... 1) Should I get the 4-key or 6-key holder? ... I only have 3 keys right now, but I feel like I might needs more in the future? For those who has the 6-key holder, do you feel that it is too big to put inside your coat or bag? 2) Should I get Epi Cassis (purple), Vernis Pomme or Black MC? Thanks everyone!!