Sounds like the Mac ( or Airport ) don't know or see the internet, anymore. Not sure what you mean by "radio", Airport is radio. I'd suggest trying a direct connection to the internet, first. What type of connection is that, anyway? Cable, DSL, satellite?
I don't have an Airport box, but I seem to remember that it has a "Reset" function. You might try that, also.
If you dump Safari, you may also lose the ability to designate any browser as the default for the System to use. That's right, Safari has the interface to set that user choice. Same for your email choice, that's set by Mail. Rather than delete them, just make a zip archive ( available in the Finder: File->Create Archive of [selected file] ) and store them someplace secure ( same drive, external drive, CD, etc. ). That way, should you ever need their abilities again, you will have them.