Where are you?
You do realise that the whole case/screen protector thing is a big con? I've had my 3G since July and there's not a mark on it. I was on a training course last month which involved a lot of physical activity and we all had to deposit our valuables in a small bag with everyone elses. My iPhone was in there will approximately 20 other phones, sets of keys, loose change, watches, etc, and when I got it back two days later not a mark on it.
It's your choice, and some people like them astaetically, but I wouldn't want you to fall for the lie that your phone needs some sort of scratch protection.