My (indult) parish has used Mozart Masses for Christmas and Easter the past few years. They don't quite overwhelm, but liturgically we lay it on rather thick anyway. It's a close call. I wouldn't mind trying Palestrina for a change; maybe I'll find a way to mention this to our pastor (a music major from Northwestern).
Now that I would LOVE to hear. It must be wonderful. When I was growing in Michigan, they used to perform Mozart's Requiem on Good Friday at Sacred Heart Cathedral in Detroit.
I don't care how good (or bad) a Catholic Mozart was, his beautiful music could only have come from some divine inspiration.