My new Paradigm Studio 20's and CC570 came in today. For the short term the 20's will be my main speakers until I order the 100's. What are these replacing you ask? Why, Bose 301 Series III circa 1990 and an Infinity Center channel I bought in 1994. After 14 years with the Bose and 10 years with the Infinity, I have finally upgraded my speakers. Thank you, HTF!