I started out in mid-fi with Class A/B SS, then played briefly with Class A SS, then went through a host of digital amps after finding this website years ago, then settled on SEP EL84's for my OB mains.
I drive the helper woofers with a Class D plate amp.
My currently system is about one tenth the power of my last SS system, but the speakers are also significantly more efficient.
I run no formal preamp - single source system with the preamp built into the source - Bolder modded SB3.