Ceremony Music

So the next decision I need to make is what type of music we are using for the ceremony. As of right now, we only have our DJ’s sound system for our outdoor ceremony. My mom is trying to find somebody to sing a few songs at some point, but nothing in stone yet.

it is a religious ceremony with a minister (although neither of us are overly religious) and she wants our choices by the end of july. We have the option to have music in between readings during the ceremony, and our minister wishes them to be somewhat religious in nature.

looking for ideas on what other brides have used for:
-guests being seated (approx half hour span)
- moms and grandparents down the asile
- bridesmaids down the aisle
- bride and father down the asile
- optional somewhat religious music during ceremony
- walking back down aisle after ceremony (recessional?)

Any and all ideas would be helpful!