My favorite Christian band of all-time is Jacob's Trouble. The group was around in the late 1980s and early 1990s, and made music heavily influenced by the Beatles, the Monkees and U2...which, naturally, caught my attention.
Loved their work. I still listen to it often and it gets the juices flowing. If I were ever to be in another band (I played the amateur musician in my teenage years and early 20s), it would without question be modeled after Jacob's Trouble.
I recently discovered their blog, set up for a reunion show they're doing in Atlanta (wish I could be there!). Love their stuff!
Here's a live video of their great song "Wind and Wave", if you're interested...