I have a quick question. I am running r40's for the main speakers in my home theater. They sound very very good.. Especially after a good quarter inch of polyfill on the inside walls to reduce resonance especially at high volume. I am thinking of replacing these with bookshelfs on stands preferably the rti38's. Do you recoommend bookshelf's for main fronts? I am just curious and would like to hear various input from people. Thanks!