Looking for right Mark Levinson Preamp to pair with No 532 Amp

I am upgrading my Krell Vanguard integrated amp and my friend is selling me his Mark Levinson no 532 amp. I primarily use my system for vinyl but occasional stream Bluetooth. I also am currently using KEF R5 speakers. I am going to also upgrade my speakers. I have already purchased the Amp and would like to stay with ML for pre-amp but open to suggestions. Also I have a budget of about $15-$20k that I want to spend and I am willing to purchased pre-owned if in good condition.

Thank you in advance for your expertise.