Hmm. What's wrong with something simple, like Fedora Desktop? Personally, I think something like Fedora GDesktop Linux 7 is just foolish. "Fedora Collection"... lol.
Fedora Linux 7 works for me. I think in general, if Linux -really- wants to hit the desktop market then the names shouldn't sound so geeky, like "Fedora XFDesktop Linux 7". Normal people will look at that and walk away.