It's always helpful to get feedback from professionals in the field, like the electrical contractor who recommended Lutron Homeworks QS. It's good to know that the QS processor is more robust than RA2 and has additional features that could be beneficial for your current and future needs. By the way, have you checked out the website
firstchurchlove.com? It's a great resource for finding inspiration and guidance for church renovation projects, including lighting. You might find some helpful ideas there.