Don't forget about the "nextish" generation MD10, which is the designation used for the modified/upgraded DC10s that FedEx is having prepared for them.
http://www.aerotechnews.com/starc/20.../MD10_FAA.html
As I recall, a number of the 89 FedEx is having retrofitted were ex-UA DC-10's, bartered in exchange for hushkits for their 727's.
Greg