My speaker choice has been guided by my adoption of SET as the best existing amplification technology.
I have tried many amps and tech, including:
Class AB PP UL tubes (various)
Class AB SS (various)
Class A SS (various)
Class A triode PP (VAC 30/30 mkiii and WLM. PureSound A30)
OTL (Transcendent Sound and Silvaweld and heard at length GRAAF and Tenor)
Class AB hybrid (Sphinx)
Class A SE(hybrid) (NAT Symbiosis SE)
Class A SEP (Mastersound)
Class A SET (Aries Cerat, KR Audio, Amplifon, Silvercore, JJ, Wall Audio, Ayon, Amare Musica, Cary, Chinese)
Of all those types the best were SET, OTL, PP Triode and hybrids (Sphinx PJ14 and 16, Ypsilon Phaeton (Shows) and NAT).
Yet to try at home: Aries Cerat Essentia, which is a single stage triode/FET but with high power SET output. Also, SEOTL…currently only Transcendent Sound makes one (AC used to on order.). One of those could dethrone SET but while OTL got close it fell short on tonality.
All the moat interesting sounding were low ish power and this then guides the speaker choice for me.