Hi, I have crossed over to the dark side and am now needing/wanting my first Hermes bag, which I think will be a Kelly. I have mostly black bags and need advice on which Kelly might be best (color and leather) if I were to get just one Kelly bag to use and last forever. (Of course I say that now, we'll see!) I am leaning to gold or deep red, but wondering if I should stick with black. Also which leather is least expensive? Thanks very much for your help!