You have entertaining gospel music and you have spiritually uplifting music. The cheapest and easiest screen test for buying decent entertaining music is to simply read the message being sent on the cover. The concept being advertised on the cover photo is a very thought out and planned idea. If the picture looks more worldly than holy, you might save some money and keep right on shopping. Beyond that, I think music can be entertaining without sounding too much like popular grunge, gangster rap or metal rock, etc.
Great musicianship is entertaining.
When looking for good spiritual music, the cover test is a little more difficult and may not even be able to be applied at all. Apostolic artists actually do seem to have an ability to transfer the Spirit of the Lord to a music project. I look there first. After that, I go with music artists that have a tradition for wonderful songs that minister to the soul. I think that generally it is a good start to avoid secular, worldly, or non-Christian music.