Manvex is one of the better ones IF you don't mind the leather covering the bezel. It's one of the few that lets you close it with your keyboard attached.
Make sure you get one that is cutout on the left and right sides. The black one I was considering, wasn't so I had to go with another color.
FWIW, I've always prefers the
Poetic case, but it doesn't work as well with the touch or type keyboards, so I'm STILL looking for a better alternative. I feel the leather covering the bezel just looks cheap.