I prefer the very first recording of Rhapsody in Blue, made in 1924. That’s Gershwin himself playing the piano!
https://www.youtube.com/watch?v=1Okcn34E1RY
Even better is this amazing solo piano roll recording Gershwin did in 1925 for the Duo-Art reproducing piano:
http://www.youtube.com/watch?v=6JlXDkkmUdA
bttt