Ive had the C30s and decided to go with the 20s for right now ..For me the difference in performance against the difference in cash just didnt add up..Id get the C50s if stepping up,the 30s are like the ugly step child ..same thing happened with the older C2s..no one bought them..It was either the c1 or the C4s.Anyway..heres my short list for Dynaudio power..Simaudio,Pass labs,Gryphon,Boulder....Never say never but tubes no way..my opinion!