I videotape weddings and want to stream them live AND record them to DVD simultaneously (including audio). It was suggested that instead of using poorer quality I.P. web cameras, or security camera systems, that I could instead use Sling.

Is this good advice?  Will it improve the quality?  I assume I would need the highest end Sling model so it would have all of the input and jacks in order to capture audio, and send a signal to a DVD player?  Can anyone tell me if this is possible and what other type of hardware and software I would need to make this work?  The end user would be able to watch on any internet connection and not need any kind of Sling equipment himself?

Thank you!