Quality Interconnects for recording

I agree with Zd542. Beyond the issue of sound quality, the mini disc format's time has come and gone. When you can't find a single new mini disc player on amazon.com you know it's a technology that isn't being supported any longer by manufacturers or users. You would have spent weeks or months doing the digitization, only to have to transfer everything to a different format sometime in the near future.

We don't know your source.
Entry level AQ or Kimber may not be enough. For $500, if you buy used, there are many. It's impossible to say which one will be the best overall.
If I wanted to do something like that, I would compare Mogami, Nirvana and the best Purist for up to $500 and see if it makes a difference. Probably will, the question is how much. New cables usually need 100-200 hours of burn-in time to fully open up.

@Sfar,

I have SONY MDS-JA 555 ES Mini Disc recorder which I can
stack against any NAD, Marantz, Naim Nait CD Players.
Tested and proven. That's why I have no problem to invest the money in the quality interconnects.

Actually I borrowed some Cardas Interconnects and so far
I am getting best sound with the Cardas 300B MicroTwin.

If it sounds as good as your CD players, you most likely have a PCM dac, and not ATRAC. If you like the Cardas, you would probably like Kimber Hero, Siltech 90i, MIT AVT-1 and AQ Jaguar/Columbia.