Freedom Call fan for 13ish years.
They released a big double (triple, including the bonus CD) album a few years back called 'Ages of Light' which does a good job of summing up everything they had done from 1998-2013. I'd start there to get familiar with their more popular tracks/songs they're likely to play.
HOWEVER, they released which is, in my opinion, their best album - 'Beyond' - in 2014 and hoping to hear more from that. Title track and 'Paladin' are, again, two of my favorite songs they've EVER done.
I'm seeing them again in a few weeks. I think they're still doing the '666 Weeks Beyond Eternity' tour/setlist but maybe I can get some insight into ProgPower and let them know how pumped we all are for them to be playing