I've been a Relient K fan for awhile, their new album is the only one I really loved though, the others were hit and miss with me. Their new one has some of their most clever lyrics, and creative music. They are great for a pop-punk act, though there are tons of bands that blow them away outside...
Some excellent videos in the "christian" market are Skillet's Savior video and Blindside's All of Us video.
Of Relient K's previous videos, Chapped Lips, Chapstick, and things like Chemistry was quite funny, and more creative than this new one.
No, heck, Last Temptation of Christ struck me far more powerfully with Christ's death. I realize it's not 100% accurate, the movie even admits that beforehand, warning that the movie is not based on the gospels but on a fictional book, but I thought the portrayal of Christ's death made it far...
Interestingly enough, Sufjan Stevens, who is very open about his Christianity and writes about it frequently, has non-christian fans who don't mind him singing songs about his faith.