Hi Ruidrosa,
I listened the Electa Amator with many S.S and it sounded always perfect
Obviously you can try with good S.S .. a suggestion could be a Parasound Halo A21 , I saw one here preowned sold for less than 1500 $USD
But remember to try only good S.S with high current and amperes on the speaker cables .. Electa is fantastic speaker but demands current from amps.
IMHO