I would consider it if I were having a problem. So far no issue. Hopefully that will continue. Since I added the Zagg shield and my bumper has not arrived, I'm going without a case. I will make some calls today to test whether the reception issue is an issue for me.
In the end the X will be an F. For me at least, the iPhone as a video device is secondary to it's use as a phone, email device. If I want video, I have an iPad for that. The little extra real estate on the Evo and the X, would not cause me to watch more video on my phone but would add some size and heft to the phone that I typically keep in my shirt pocket.