The four or more club

I was looking through my CDs last night (yes, I know that they will probably be quickly passe, but I did buy another one this week), and realized that I had several artists that I had three CDs by, but only a few that I had four or more by. The artists are (in alphabetical order):

Amy Grant
Cindy Morgan
Rich Mullins
Fernando Ortega
Michael W. Smith
Trisha Yearwood

My musical tastes, obviously, run to folk/pop/country. Some of my CDs are less conventional.