What are the best screen protectors for the iphone 4S?

I just purchased my first iphone the other day and have been afraid to bring it out with me or even use it a lot until I get a screen protector and case. I looked on Amazon and there are so many different brands and styles. I also did some research, but I still don't know which one is the best. I want a good screen protector that doesn't cost too much. Which brands do you suggest? Also, do they sell cases with screen protectors in one or are they sold separately.

You can get a Skinomi Screen Protector or a cheap $1 pack that has like 6 on ebay (those work fine but it might take a few tries to get a perfect fit which is why you get so many). When i bought my iPhones, they gave me free cases and screen protectors at the Verizon store.

I'm using a transparent silicone black case.