Classe sa 150 Parasound A21 or CJ Mf2550A

Any input would be good. Heres my story. I picked up a used Classe sa 150 from a dealer with a 90 day warranty . Ran it for two days and it blew a cap or at least that was the dealer had thought. Fast forward it turns out it is beyond repair. While I had it hooked up it was a big improvment over previous amp. So the dealer can credit me for another amp and is a parasound dealer . He offer a good price on a A21 halo. Also I have an option to buy a CJ mf2550a but cant listen to it because of locale. I am using a tube pre that I cannot get the output impedance spec, now the amp the Classe replace had a 22k input the Classe had 75k the Parasound 33k and CJ 100k. My thought was part of the improvement with the Classe was the higher input rating. So would I be ok with the new Parasound or find another Classe or a used Cj mf2550a at the same cost as th new A21.