Nakamichi Receiver 1, 2 and CD Player 1, 2, 3

Is anyone familiar with Nakamichi Receiver 1 and 2, and how they compare to SR and TA series?
Also, whether Nakamichi CD Player 2 and 3 are at all comparable soundwise with CD Player 1 (and any other comments on those machines)?
Much thanks.
Forgot something: how would you compare the Luxman receivers of that era (latter '80s-early '90s) to any of these Nakamichi models?
Thanks again.
I have Receiver 2 and CD Player 3. No idea how they compare. would like to know too. the cd palyers are all comparable. Excellent sound and reliable (unlike the reciever).