I enjoyed the recent Symphony X, but I would not consider it for the moon. It's much more heavy metal and just not enough of the symphonic side to include with progressive.
I am a total Tool fan, but again, the same thing. They are certainly much closer to the progressive side, however. And I certainly would not mind a few of their pieces slipping into the rotation.
I haven't heard the other bands. But with a name like Angra.... hmm do you think they're angry?
Even Mastadon which has made it on some progressive lists or stations is just too hard. We're still working to get more Dream Theater in the library. It's a tough nut to crack. You know how us old foogies can be about what we like once we're stuck on something.
Thanks for the suggestions for some side listening, though. I like all sorts of stuff other than what I hear on the AM.