My "upgrade" from my Thiel CS3 speakers was to Duntech Princess speakers (the forerunner of Dunlavy SC 4s). Interestingly, both speakers use first order crossovers and are designed to be time and phase coherent. I wanted a bigger sound with more dynamics, and the Duntechs fit the bill. It helped to have a large enough listening room for them. I still get to visit my old Thiels, as I sold them to a friend
who still enjoys them.
who still enjoys them.