I have the Rocketfish Clear Soft Shell Case from Best Buy (sku 6424122) that I picked up for around $23. It's made from TPU and hasn't scratched or scuffed the phone. It fully covers the chamfered edges and doesn't add a lot of bulk. It also has perfect cutouts and fits very well. I went this one because you can see if it's starting to collect dust inside of the case and clean it out before it causes scratches. I had the iPhone4 in a black case and the dust particles actually etched into the glass from being against it in the case.