I maintain and use four systems. By a process of mixing and listening I have a main system I am very happy with and m unlikely to ever change - VPI TNT V, SME V, Koetsu Urushi, Vendetta SCP2-D, Conrad Johnson Premier 14, Conrad Johnson Premier 11a, Wilson Maxx 2, Inouye power conditioner, Moon 280D DAC.
But my second system, which I use mostly for acoustic music is also wonderful - Sota Cosmos, SME V, Lyra Clavis, Bryston BP17, Conrad Johnson Premier 15 phono, Classe DR3 VHC, Martin Logan CLS, Hegel HD12 DAC
An my third system is one that I also use a lot, made up of bits that began years ago in my main system - Roksan Radius 5/Nima/Goldring Eroica LX Classe DR-7, Classe DR3 VHC bridged monos + PSE V monos (bass), Classe DAC1 DAC, Vandersteen 4A, - kind of a state of the art c. 1990 set up (excpt for the turntable, a modest one added much later),