I'm happy this thread popped back up, because I've meaning to comment for weeks.
Regarding "Neue Regal": for a long time, this was not only my favorite QR song, but my favorite song ever. I would go so far as to say the second half of RFO is not only my favorite batch of QR songs, but also their most cohesive musical statement to date.
Regarding "One and Only": it's, hands down, my fav track off Empire.
As far as favorite songs, I hold the 'DeGarmo' years in such high esteem, it's difficult to separate the songs from the albums.
That said, keeping in the spriit of the thread, here are my top picks per album:
E.P. — "Nightrider," "The Lady Wore Black"
Warning — "NM 156," "Roads to Madness"
Rage for Order — "Neue Regal," "Screaming in Digital," "London" (but seriously, this is a flawless album IMO)
Operation Mindcrime — "Speak," "Suite Sister Mary," "The Mission"
Empire — "One and Only," "Anybody Listening," "Jet City Woman"
Promised Land — "Damaged," "Lady Jane," "One More Time"
Here in the Now Frontier — "Hit the Black," "Spool"