What are the best phones on U.S. Cellular?

I have verizon right now, I have a chocolate touch but my family's contract is running up soon and we're switching to U.S Cellular and I was wondering what their best phones are? I don't know if I want an Android phone or a Blackberry. I want something that will last a long time, is responsive and fast, and that gets good service. I know U.S. Cellular has great service where I live though, so it's ok. Any info. helps, thanks