Theocracy indeed... although it's more power metal with some nice prog leanings than prog....
Old school Tourniquet. The first three albums (stop the bleeding through Pathogenic Occular Dissonance) are fantastic. The vocals are kind of wierd. Not really growling, not really screaming... kind of a combination of both. LOL. When the guitar player sings it's just yelling. LOL
Vinnie Domine is superb. Queensryche type prog only heavier. Excellent vox.
As said, definately Neal Morse.
The DC Talk et al mention was interesting... definately not prog. LOL. However, DC Talk's last album, Supernatural is very Queen, Sting, and U2 influenced. Those three guys are always very underated.
Balance of Power wasn't really a christian band nor really prog. Again, just power metal with prog leanings. On that note though, Shadow Gallery is a little more a christian band than BOP (more members claim to be christians

... Lance King was the only one I know if in BOP that claimed to be so, and wrote a lot from that standpoint.)
Anything with Kerry Livgren in it (his mid 80s project "AD" is most excellent) or John Elefante is going to have some nice prog moments. Even John's pop solo albums have some great prog moments. His Defying Gravety disc is superb... just superb. His Mastadon project is also outstanding 80s hair prog. LOL
Read this thread for more....
http://p216.ezboard.com/fnealmorsefrm7.showMessage?topicID=120.topic Keep in mind that not being a "CCM Christian band" does not make the people in the band not christians. By the method attributing BOP a Christian band, it woudl be more than fair and equal to attribute DT a christian band with more than one member claiming to be believers.... Christians are people just like anyone else, with loves, dislikes, and the need to make a living.