Dear Steph,
welcome.
What i can tell you now is that you are in a big trouble,because also i started like you listening D1,C1 A1 mono and i bought C1 and A1 mono using Transport of my Wadia S71
I was very very happy like you but then i bought also X1 L1 P1 M1 mono after listening in my system,and CH are very clever to let you develop the system when you can.
I listen music with tube since 1978 with Hal amp,ARC D 90B,sp8,sp10,Jadisecc ecc and from 1992 with top triode tube like Yamamura,AudioTekne,ANJ,Kondo,Dissanayake,MActone otl,FAL,Shindo
until 2015.
I never liked a lot SS because i loved triode amp,mainly with 2A3.
The shop of my friend had TAD R1,Wilson and Rockport Cygnus and had in shop Pass XS and XS 300,Esoteric Grandioso amp and pre,Pandora and Mephisto,Rowland 925,and other and i also listen Constellation,all good sound but not for me.
One day there was a demo in this shop with Wilson and CH D1 C1 and A1 mono
I was shocked,i don't like a lot Wilson,but i listening a very good sound,clean,fast,detailed but sweet,deep bass and fast and i was very surprised.
I brought home CH and compared to my Kondo KSL M7 and 2 Souga and i liked more,founding same natural sound and tone of mid but with more details,aire,deep bass,dynamic and infinite power,that shocked me and i bought
After i tried X1 with C1 and sound was more dense,natural and deep with more space between instrument and then i bought L1,an other good step increasing a little better of everything.
So i suggest when you can try X1
In future you can think to try also L1.
In X1 i have 2 board,one for L1 and one for P1,in future i want to buy a second X1 without board because i have 2
I tried M1 mono vs A1 mono in my system,i had both.
Sound is similar because amp are exactly same,only difference is big trans in M1 and 1 or 2 transistor more,i don't remember,but with M1 the sound come out easily,scene is bigger and deeper and instrument are bigger,so seems more natural and liquid and sound go out from speaker seems without stress
I tried M1 on bass and mid with passive biamp and A1 mono on tweeter ( i can triamp my speaker) but i listened instrunmet out for tweeter smaller,while putting M1 on mid high was correct
so i sold A1 to my friend
But enjoy your system
Gianluigi