I am a little late to this thread. I have owned the Studio 20s and currently have a pair of the BW 685s in a second system. I preferred the Studio 20s, believing them to be more dynamic. Wish I had kept them. Either speaker can be driven by a solid 50wpc. Not sure 50wpc will due the Dynaudiox14s, though I believe the x14s were designed to be easier to drive than the x12s (greater impedance). I heard a pair of x12s at a dealership and thought them to be excellent.
Since you are going to upgrade your amp, which I believe to be wise, I would select the speakers first and then purchase an amp that compliments. When auditioning, pay attention to the amp used.
Since you are going to upgrade your amp, which I believe to be wise, I would select the speakers first and then purchase an amp that compliments. When auditioning, pay attention to the amp used.