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.