[PolloLoco]

I bought a blue case from ebay, identical to the first one you listed. I've gotten a fair amount of compliments. I paid $7 total.

That said, I had a Seidio crystal case identical to this design for the 6700 - and would definitely argue that it's not worth paying for their "quality". Within a year I had two tabs break - and that's after not once removing the case.

If you're going to get a case like this, just go with one of the cheap options. Just note that any of these will make your case substantially thicker.