FM7 is probably easier than a real DX to program (never exerienced programming a real one though).
Best thing about FM7 is the random button!
Can you actually transfer patch-data from a FM7 to a DX/TX?
Anyway...
I keep seeing TX7s (rack DX7) here for sale. Some are selling for as cheap as $50aus. I am thinking I should pick one up just to get a side by side comparison of FM7.