Which Nakamichi to choose?

Problem solved was still a problem.

The Tandberg TCD910 would be great but they are rare. What about the 3004?
https://www.ebay.com/itm/Tandberg-3004-Vintage-Cassette-Deck-Near-Mint-Condition-for-parts/123311638...

Aiwa also made some good decks I hear.

From what i have read on tbe internet there were 200 910s made and 100 911s which were (warning) playback only. There were 4000 3014s/3014a's made. There were 40,000 Dragons made during its around 10 year run from 82 to 93.im going by memory here.

On the 3004 there  was a 100 or less made. It came before the other tandbergs. Stay away from the 3034. 

Back in the late 90s I used to go into Gifted Listener Audio in Centreville VA and just stand there and ogle the Tandberg 3014 they had on display. I even dragged my buddy in to ogle it with me once. Whatever they wanted for it was far beyond my means back then but dear lord that thing was a Deadheads wet dream of a deck!