I'm using the dark gray smart cover and a rear leather skin from Sticker boy. I couldn't get the corners of the skin quite perfect...when installing like they say, it created huge wrinkles and sharp edges, so I overlapped and it's better, but still a little annoying...they're sending me a Type 4 skin now (excellent customer service), which has full coverage except for the sides of the corners, which I think will work better for me. I love the leather feel and look, though:
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edit: WTH? Macrumors blocks the combined name of sticker boy? Why? it even blocked it in my image reference since that's what I named my file...I had to rename the filename to allow it to show.