Step up from Nakamichi 582 tape deck?


Have an option to acquire a very good working order 680zx.
At present have a 582 and was interested if those in the know would consider it to be a worthwhile upgrade?

Or would I need to go even further up the food chain? Zx-7 or 700zxl or?

I have just purchased a massive lot of tapes at pennies per tape so do not foresee me forsaking this medium anytime soon .. Lol.
128x128uberwaltz
I am liking it and the sound.  300 bucks.  Making tapes and playing tapes and glad I have a lot of these old Maxell UDXLII 90 mins because they sound a lot better than the std bias UD that is for certain.  I didn't realize they stopped making the chrome tape so it's good to have recording stock.
You can end up paying more for NOS tape especially Chrome from fleabay than you did your player!

Glad you have a stash!

I have found a few NOS tapes in charity shops of late.

Enjoy your new deck!
Yeah thanks, I had no idea on the tapes.  The Maxell UDXLII in particular still sound great and the case also seems way better than the TDK SA.  I bought probably 3x the Maxell so that's good news too.  I hate to play regular tapes because I believe they may coat the heads faster.  Anyway it's my theory and I am "sticking to it" pun clearly intended!
TDK tapes always ended up stretching the few time I tried them. Maxell UDXL-II and XL-IIS were my favourite by a landslide. TEAC cassette reel to reel tapes performed admirably also, but weren’t as readily available as the Maxell tapes. 
I’ve got a Sony TC-K570 3 head deck bought in the mid-90’s which I’m amazed with how good it sounds. Previously it was a Technics RS-M234X 2 head deck with dbx that performed flawlessly. I never got around to trying the Sony with my dbx 224 encoder/decoder but when I eventually do, I believe it’ll be utopian.