I came across Delirious? a couple of months ago, when someone showed me a video of them performing History Maker. I was struck by two things - first, that their lyrics are explicitly Christian to the point where they couldn't possibly be interpreted as anything else. Second, that their music (ignoring the lyrics) is catchy as hell, superbly played, and they know how to write a hook that embeds itself in your brain and won't go away.
I'm a committed atheist, and the very idea of organised religion makes me uncomfortable, so I'm personally really not comfortable with the overtly Christian message in Delirious?' music. But I couldn't get past the fact that the overall sound is fantastic. After a bit of agonising, I gave this album a listen, and it has confirmed both my initial impressions - first, that the lyrics are all perilously close to preaching, and second, that the music to History Maker wasn't a one-off - these guys know how to write a tune, and are a seriously tight live act.
If the Christian message doesn't put you off, as a rock fan, Delirious? are well worth checking out. They remind me a lot of mid-period U2 in places, particularly in terms of the guitar sound, and the anthemic nature of the songs is perfectly suited to live performance. For me, the music is good enough that I'm going to just ignore the lyrics - if you're a Christian, you won't even have that problem! Definitely worth checking out.