Best iPad back cover to go with Smart Cover?

At the moment I have an iPad 3 with the recent Smart Case. However this case kind of sucks in many ways (feels loose, tacky and poor quality) and I'm thinking of returning it and getting a Smart Cover which I fell in love with. However that doesn't help with the back of the iPad. What are the best ones that I can buy for the back? My iPad is white and I'd rather it just be simple and sleek and feel good and sturdy in the hand. I'd prefer the same color light grey as the smart cover I will get, but something transparent would be fine as well