I wouldn't want to switch to instrumental music, I enjoy singing along too much! I compiled a bunch of uplifting songs and posted on an older thread: Motivational music?
I don't still like all of those songs, but many are good.
I don't listen to music too much these days. The stuff on the radio is generally not so good and too many commercials, compiling my own playlists is too much time and effort. I like the music at my church, it is generally positive and good to replay in my head throughout the week.