Now thank we all our God From Cantata no. 79 - J.S. Bach arr. Virgil Fox

I really love this piece. It has a very nice tempo that doesnt make it too fast or too slow and has a very specific rhythym that drives it along and carries that rhythym until the ending ritardando. If you are creative enough, you can get it to work on just about any organ as long as it has at least 2 manuals. Ive even played this piece on a theater organ.