Just a quick note to say how much I love my newly-purchased CX78 joypad. This controller completely redefined my gameplay experience on the 7800. Went from a Painline controller that died to a 2600 controller without the 2nd button to the CX78. Absolutely love it.
Bought it NOS from Brad at Best Electronics. He has less than one box of them left, so if you've been entertaining the idea of getting one, now is the time before they are gone. You'll love it.
Note: I'm not a celebrity and not a paid endorser, although I am open to being both.