great collection, specially your gold 1000ZXL (if I am correct about the model) is a museum item. That deck is priceless
Haven't seen a gold deck since I left the muffler/brake shop in '98... I just got fired, and though it was mine, I left it as part of the shop's system. Only have a Yamaha K-960 now. It ain't much, compared to these pieces, but it's mine... and it just got it serviced. And after many years of cheap 'box decks and low-buck in-car systems, I've yet to hear better. And I probably would... if my brother stored his Carver better.
Here's a write up of the Nak 1000ZXL in gold on the Vintage Knob, Very nice! http://www.thevintageknob.org/nakamichi-1000ZXL_Limited.html