I know for me, I LOVE music & always have, so I have the tunes going all the time. But I found that the longer I walked with the Lord, the harder it was for me to feel comfortable listening to secular music. For me, it wasn't so much of a "this sounds trashy so I can't listen to it"...the vulgar stuff wasn't even what I was listening to B4 Christ.
It was more like, "Ok, there's nothing negative in this song, but then again, there's nothing positive in it either." Why settle for neutral when there's so much awesome Christian music out there? I don't know about y'all, but there's a lot of negative coming at us every day...I need all the help I can to be able to "think on things that are lovely & holy & of good report."
I'm not saying every song by a Christian artist is great...I think we need to be discriminating about that, too. And there have been secular songs pointed out in this thread that may be good ones (I don't know them), but for me...all I listen to is Christian...not dogmatically; it just happens to be what helps me keep my focus. (Then again; God removed TV from my life, too...another focus factor for me.)

Whatever you're listening to; let it be a matter between you & the Lord. Don't let other people & especially not denominational rules be the deciding factor.