"The Visit", because that's what she does! She makes you feel like you are in her family for the time she is in front of you. Then she is gone. I agree that I would also like to hear
"Kecharitomene" because that song just plain "rocks" as much as Celtic can. I would really love to hear "Courtyard Lullaby" myself.
That is just the spookiest sounding song, which goes great right into "Beneath A Phrygian Sky".
I guess we'll all find out soon enough.